INSTRUCTION
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leave the pyreverse. utils. Project node
|
def leave_project(self, node): # pylint: disable=unused-argument
"""leave the pyreverse.utils.Project node
return the generated diagram definition
"""
if self.pkgdiagram:
return self.pkgdiagram, self.classdiagram
return (self.classdiagram,)
|
visit an astroid. Module node
|
def visit_module(self, node):
"""visit an astroid.Module node
add this class to the package diagram definition
"""
if self.pkgdiagram:
self.linker.visit(node)
self.pkgdiagram.add_object(node.name, node)
|
visit an astroid. Class node
|
def visit_classdef(self, node):
"""visit an astroid.Class node
add this class to the class diagram definition
"""
anc_level, association_level = self._get_levels()
self.extract_classes(node, anc_level, association_level)
|
visit astroid. ImportFrom and catch modules for package diagram
|
def visit_importfrom(self, node):
"""visit astroid.ImportFrom and catch modules for package diagram
"""
if self.pkgdiagram:
self.pkgdiagram.add_from_depend(node, node.modname)
|
return a class diagram definition for the given klass and its related klasses
|
def class_diagram(self, project, klass):
"""return a class diagram definition for the given klass and its
related klasses
"""
self.classdiagram = ClassDiagram(klass, self.config.mode)
if len(project.modules) > 1:
module, klass = klass.rsplit(".", 1)
module = project.get_module(module)
else:
module = project.modules[0]
klass = klass.split(".")[-1]
klass = next(module.ilookup(klass))
anc_level, association_level = self._get_levels()
self.extract_classes(klass, anc_level, association_level)
return self.classdiagram
|
Get the diagrams configuration data
|
def get_diadefs(self, project, linker):
"""Get the diagrams configuration data
:param project:The pyreverse project
:type project: pyreverse.utils.Project
:param linker: The linker
:type linker: pyreverse.inspector.Linker(IdGeneratorMixIn, LocalsVisitor)
:returns: The list of diagram definitions
:rtype: list(:class:`pylint.pyreverse.diagrams.ClassDiagram`)
"""
# read and interpret diagram definitions (Diadefs)
diagrams = []
generator = ClassDiadefGenerator(linker, self)
for klass in self.config.classes:
diagrams.append(generator.class_diagram(project, klass))
if not diagrams:
diagrams = DefaultDiadefGenerator(linker, self).visit(project)
for diagram in diagrams:
diagram.extract_relationships()
return diagrams
|
Check if the given owner should be ignored
|
def _is_owner_ignored(owner, name, ignored_classes, ignored_modules):
"""Check if the given owner should be ignored
This will verify if the owner's module is in *ignored_modules*
or the owner's module fully qualified name is in *ignored_modules*
or if the *ignored_modules* contains a pattern which catches
the fully qualified name of the module.
Also, similar checks are done for the owner itself, if its name
matches any name from the *ignored_classes* or if its qualified
name can be found in *ignored_classes*.
"""
ignored_modules = set(ignored_modules)
module_name = owner.root().name
module_qname = owner.root().qname()
if any(
module_name in ignored_modules
or module_qname in ignored_modules
or fnmatch.fnmatch(module_qname, ignore)
for ignore in ignored_modules
):
return True
ignored_classes = set(ignored_classes)
if hasattr(owner, "qname"):
qname = owner.qname()
else:
qname = ""
return any(ignore in (name, qname) for ignore in ignored_classes)
|
Given an owner and a name try to find similar names
|
def _similar_names(owner, attrname, distance_threshold, max_choices):
"""Given an owner and a name, try to find similar names
The similar names are searched given a distance metric and only
a given number of choices will be returned.
"""
possible_names = []
names = _node_names(owner)
for name in names:
if name == attrname:
continue
distance = _string_distance(attrname, name)
if distance <= distance_threshold:
possible_names.append((name, distance))
# Now get back the values with a minimum, up to the given
# limit or choices.
picked = [
name
for (name, _) in heapq.nsmallest(
max_choices, possible_names, key=operator.itemgetter(1)
)
]
return sorted(picked)
|
Try to see if no - member should be emitted for the given owner.
|
def _emit_no_member(node, owner, owner_name, ignored_mixins=True, ignored_none=True):
"""Try to see if no-member should be emitted for the given owner.
The following cases are ignored:
* the owner is a function and it has decorators.
* the owner is an instance and it has __getattr__, __getattribute__ implemented
* the module is explicitly ignored from no-member checks
* the owner is a class and the name can be found in its metaclass.
* The access node is protected by an except handler, which handles
AttributeError, Exception or bare except.
"""
# pylint: disable=too-many-return-statements
if node_ignores_exception(node, AttributeError):
return False
if ignored_none and isinstance(owner, astroid.Const) and owner.value is None:
return False
if is_super(owner) or getattr(owner, "type", None) == "metaclass":
return False
if ignored_mixins and owner_name[-5:].lower() == "mixin":
return False
if isinstance(owner, astroid.FunctionDef) and owner.decorators:
return False
if isinstance(owner, (astroid.Instance, astroid.ClassDef)):
if owner.has_dynamic_getattr():
# Issue #2565: Don't ignore enums, as they have a `__getattr__` but it's not
# invoked at this point.
try:
metaclass = owner.metaclass()
except exceptions.MroError:
return False
if metaclass:
return metaclass.qname() == "enum.EnumMeta"
return False
if not has_known_bases(owner):
return False
if isinstance(owner, objects.Super):
# Verify if we are dealing with an invalid Super object.
# If it is invalid, then there's no point in checking that
# it has the required attribute. Also, don't fail if the
# MRO is invalid.
try:
owner.super_mro()
except (exceptions.MroError, exceptions.SuperError):
return False
if not all(map(has_known_bases, owner.type.mro())):
return False
if isinstance(owner, astroid.Module):
try:
owner.getattr("__getattr__")
return False
except astroid.NotFoundError:
pass
if node.attrname.startswith("_" + owner_name):
# Test if an attribute has been mangled ('private' attribute)
unmangled_name = node.attrname.split("_" + owner_name)[-1]
try:
if owner.getattr(unmangled_name, context=None) is not None:
return False
except astroid.NotFoundError:
return True
return True
|
Check if the given node has a parent of the given type.
|
def _has_parent_of_type(node, node_type, statement):
"""Check if the given node has a parent of the given type."""
parent = node.parent
while not isinstance(parent, node_type) and statement.parent_of(parent):
parent = parent.parent
return isinstance(parent, node_type)
|
Check if the given name is used as a variadic argument.
|
def _is_name_used_as_variadic(name, variadics):
"""Check if the given name is used as a variadic argument."""
return any(
variadic.value == name or variadic.value.parent_of(name)
for variadic in variadics
)
|
Verify if the given call node has variadic nodes without context
|
def _no_context_variadic(node, variadic_name, variadic_type, variadics):
"""Verify if the given call node has variadic nodes without context
This is a workaround for handling cases of nested call functions
which don't have the specific call context at hand.
Variadic arguments (variable positional arguments and variable
keyword arguments) are inferred, inherently wrong, by astroid
as a Tuple, respectively a Dict with empty elements.
This can lead pylint to believe that a function call receives
too few arguments.
"""
statement = node.statement()
for name in statement.nodes_of_class(astroid.Name):
if name.name != variadic_name:
continue
inferred = safe_infer(name)
if isinstance(inferred, (astroid.List, astroid.Tuple)):
length = len(inferred.elts)
elif isinstance(inferred, astroid.Dict):
length = len(inferred.items)
else:
continue
inferred_statement = inferred.statement()
if not length and isinstance(inferred_statement, astroid.FunctionDef):
is_in_starred_context = _has_parent_of_type(node, variadic_type, statement)
used_as_starred_argument = _is_name_used_as_variadic(name, variadics)
if is_in_starred_context or used_as_starred_argument:
return True
return False
|
Try to infer what the given * func * constructor is building
|
def _infer_from_metaclass_constructor(cls, func):
"""Try to infer what the given *func* constructor is building
:param astroid.FunctionDef func:
A metaclass constructor. Metaclass definitions can be
functions, which should accept three arguments, the name of
the class, the bases of the class and the attributes.
The function could return anything, but usually it should
be a proper metaclass.
:param astroid.ClassDef cls:
The class for which the *func* parameter should generate
a metaclass.
:returns:
The class generated by the function or None,
if we couldn't infer it.
:rtype: astroid.ClassDef
"""
context = astroid.context.InferenceContext()
class_bases = astroid.List()
class_bases.postinit(elts=cls.bases)
attrs = astroid.Dict()
local_names = [(name, values[-1]) for name, values in cls.locals.items()]
attrs.postinit(local_names)
builder_args = astroid.Tuple()
builder_args.postinit([cls.name, class_bases, attrs])
context.callcontext = astroid.context.CallContext(builder_args)
try:
inferred = next(func.infer_call_result(func, context), None)
except astroid.InferenceError:
return None
return inferred or None
|
required method to auto register this checker
|
def register(linter):
"""required method to auto register this checker """
linter.register_checker(TypeChecker(linter))
linter.register_checker(IterableChecker(linter))
|
check that the accessed attribute exists
|
def visit_attribute(self, node):
"""check that the accessed attribute exists
to avoid too much false positives for now, we'll consider the code as
correct if a single of the inferred nodes has the accessed attribute.
function/method, super call and metaclasses are ignored
"""
for pattern in self.config.generated_members:
# attribute is marked as generated, stop here
if re.match(pattern, node.attrname):
return
if re.match(pattern, node.as_string()):
return
try:
inferred = list(node.expr.infer())
except exceptions.InferenceError:
return
# list of (node, nodename) which are missing the attribute
missingattr = set()
non_opaque_inference_results = [
owner
for owner in inferred
if owner is not astroid.Uninferable
and not isinstance(owner, astroid.nodes.Unknown)
]
if (
len(non_opaque_inference_results) != len(inferred)
and self.config.ignore_on_opaque_inference
):
# There is an ambiguity in the inference. Since we can't
# make sure that we won't emit a false positive, we just stop
# whenever the inference returns an opaque inference object.
return
for owner in non_opaque_inference_results:
name = getattr(owner, "name", None)
if _is_owner_ignored(
owner, name, self.config.ignored_classes, self.config.ignored_modules
):
continue
try:
if not [
n
for n in owner.getattr(node.attrname)
if not isinstance(n.statement(), astroid.AugAssign)
]:
missingattr.add((owner, name))
continue
except AttributeError:
# XXX method / function
continue
except exceptions.NotFoundError:
# This can't be moved before the actual .getattr call,
# because there can be more values inferred and we are
# stopping after the first one which has the attribute in question.
# The problem is that if the first one has the attribute,
# but we continue to the next values which doesn't have the
# attribute, then we'll have a false positive.
# So call this only after the call has been made.
if not _emit_no_member(
node,
owner,
name,
ignored_mixins=self.config.ignore_mixin_members,
ignored_none=self.config.ignore_none,
):
continue
missingattr.add((owner, name))
continue
# stop on the first found
break
else:
# we have not found any node with the attributes, display the
# message for infered nodes
done = set()
for owner, name in missingattr:
if isinstance(owner, astroid.Instance):
actual = owner._proxied
else:
actual = owner
if actual in done:
continue
done.add(actual)
msg, hint = self._get_nomember_msgid_hint(node, owner)
self.add_message(
msg,
node=node,
args=(owner.display_type(), name, node.attrname, hint),
confidence=INFERENCE,
)
|
check that if assigning to a function call the function is possibly returning something valuable
|
def visit_assign(self, node):
"""check that if assigning to a function call, the function is
possibly returning something valuable
"""
if not isinstance(node.value, astroid.Call):
return
function_node = safe_infer(node.value.func)
# skip class, generator and incomplete function definition
funcs = (astroid.FunctionDef, astroid.UnboundMethod, astroid.BoundMethod)
if not (
isinstance(function_node, funcs)
and function_node.root().fully_defined()
and not function_node.decorators
):
return
if (
function_node.is_generator()
or function_node.is_abstract(pass_is_abstract=False)
or isinstance(function_node, astroid.AsyncFunctionDef)
):
return
returns = list(
function_node.nodes_of_class(astroid.Return, skip_klass=astroid.FunctionDef)
)
if not returns:
self.add_message("assignment-from-no-return", node=node)
else:
for rnode in returns:
if not (
isinstance(rnode.value, astroid.Const)
and rnode.value.value is None
or rnode.value is None
):
break
else:
self.add_message("assignment-from-none", node=node)
|
Check that the given uninferable Call node does not call an actual function.
|
def _check_uninferable_call(self, node):
"""
Check that the given uninferable Call node does not
call an actual function.
"""
if not isinstance(node.func, astroid.Attribute):
return
# Look for properties. First, obtain
# the lhs of the Attribute node and search the attribute
# there. If that attribute is a property or a subclass of properties,
# then most likely it's not callable.
# TODO: since astroid doesn't understand descriptors very well
# we will not handle them here, right now.
expr = node.func.expr
klass = safe_infer(expr)
if (
klass is None
or klass is astroid.Uninferable
or not isinstance(klass, astroid.Instance)
):
return
try:
attrs = klass._proxied.getattr(node.func.attrname)
except exceptions.NotFoundError:
return
for attr in attrs:
if attr is astroid.Uninferable:
continue
if not isinstance(attr, astroid.FunctionDef):
continue
# Decorated, see if it is decorated with a property.
# Also, check the returns and see if they are callable.
if decorated_with_property(attr):
try:
all_returns_are_callable = all(
return_node.callable() or return_node is astroid.Uninferable
for return_node in attr.infer_call_result(node)
)
except astroid.InferenceError:
continue
if not all_returns_are_callable:
self.add_message(
"not-callable", node=node, args=node.func.as_string()
)
break
|
check that called functions/ methods are inferred to callable objects and that the arguments passed to the function match the parameters in the inferred function s definition
|
def visit_call(self, node):
"""check that called functions/methods are inferred to callable objects,
and that the arguments passed to the function match the parameters in
the inferred function's definition
"""
called = safe_infer(node.func)
# only function, generator and object defining __call__ are allowed
# Ignore instances of descriptors since astroid cannot properly handle them
# yet
if called and not called.callable():
if isinstance(called, astroid.Instance) and (
not has_known_bases(called)
or (
isinstance(called.scope(), astroid.ClassDef)
and "__get__" in called.locals
)
):
# Don't emit if we can't make sure this object is callable.
pass
else:
self.add_message("not-callable", node=node, args=node.func.as_string())
self._check_uninferable_call(node)
try:
called, implicit_args, callable_name = _determine_callable(called)
except ValueError:
# Any error occurred during determining the function type, most of
# those errors are handled by different warnings.
return
if called.args.args is None:
# Built-in functions have no argument information.
return
if len(called.argnames()) != len(set(called.argnames())):
# Duplicate parameter name (see duplicate-argument). We can't really
# make sense of the function call in this case, so just return.
return
# Build the set of keyword arguments, checking for duplicate keywords,
# and count the positional arguments.
call_site = astroid.arguments.CallSite.from_call(node)
# Warn about duplicated keyword arguments, such as `f=24, **{'f': 24}`
for keyword in call_site.duplicated_keywords:
self.add_message("repeated-keyword", node=node, args=(keyword,))
if call_site.has_invalid_arguments() or call_site.has_invalid_keywords():
# Can't make sense of this.
return
num_positional_args = len(call_site.positional_arguments)
keyword_args = list(call_site.keyword_arguments.keys())
# Determine if we don't have a context for our call and we use variadics.
if isinstance(node.scope(), astroid.FunctionDef):
has_no_context_positional_variadic = _no_context_variadic_positional(node)
has_no_context_keywords_variadic = _no_context_variadic_keywords(node)
else:
has_no_context_positional_variadic = (
has_no_context_keywords_variadic
) = False
# These are coming from the functools.partial implementation in astroid
already_filled_positionals = getattr(called, "filled_positionals", 0)
already_filled_keywords = getattr(called, "filled_keywords", {})
keyword_args += list(already_filled_keywords)
num_positional_args += implicit_args + already_filled_positionals
# Analyze the list of formal parameters.
num_mandatory_parameters = len(called.args.args) - len(called.args.defaults)
parameters = []
parameter_name_to_index = {}
for i, arg in enumerate(called.args.args):
if isinstance(arg, astroid.Tuple):
name = None
# Don't store any parameter names within the tuple, since those
# are not assignable from keyword arguments.
else:
assert isinstance(arg, astroid.AssignName)
# This occurs with:
# def f( (a), (b) ): pass
name = arg.name
parameter_name_to_index[name] = i
if i >= num_mandatory_parameters:
defval = called.args.defaults[i - num_mandatory_parameters]
else:
defval = None
parameters.append([(name, defval), False])
kwparams = {}
for i, arg in enumerate(called.args.kwonlyargs):
if isinstance(arg, astroid.Keyword):
name = arg.arg
else:
assert isinstance(arg, astroid.AssignName)
name = arg.name
kwparams[name] = [called.args.kw_defaults[i], False]
# Match the supplied arguments against the function parameters.
# 1. Match the positional arguments.
for i in range(num_positional_args):
if i < len(parameters):
parameters[i][1] = True
elif called.args.vararg is not None:
# The remaining positional arguments get assigned to the *args
# parameter.
break
else:
# Too many positional arguments.
self.add_message(
"too-many-function-args", node=node, args=(callable_name,)
)
break
# 2. Match the keyword arguments.
for keyword in keyword_args:
if keyword in parameter_name_to_index:
i = parameter_name_to_index[keyword]
if parameters[i][1]:
# Duplicate definition of function parameter.
# Might be too hardcoded, but this can actually
# happen when using str.format and `self` is passed
# by keyword argument, as in `.format(self=self)`.
# It's perfectly valid to so, so we're just skipping
# it if that's the case.
if not (keyword == "self" and called.qname() in STR_FORMAT):
self.add_message(
"redundant-keyword-arg",
node=node,
args=(keyword, callable_name),
)
else:
parameters[i][1] = True
elif keyword in kwparams:
if kwparams[keyword][1]: # XXX is that even possible?
# Duplicate definition of function parameter.
self.add_message(
"redundant-keyword-arg",
node=node,
args=(keyword, callable_name),
)
else:
kwparams[keyword][1] = True
elif called.args.kwarg is not None:
# The keyword argument gets assigned to the **kwargs parameter.
pass
else:
# Unexpected keyword argument.
self.add_message(
"unexpected-keyword-arg", node=node, args=(keyword, callable_name)
)
# 3. Match the **kwargs, if any.
if node.kwargs:
for i, [(name, defval), assigned] in enumerate(parameters):
# Assume that *kwargs provides values for all remaining
# unassigned named parameters.
if name is not None:
parameters[i][1] = True
else:
# **kwargs can't assign to tuples.
pass
# Check that any parameters without a default have been assigned
# values.
for [(name, defval), assigned] in parameters:
if (defval is None) and not assigned:
if name is None:
display_name = "<tuple>"
else:
display_name = repr(name)
# TODO(cpopa): this should be removed after PyCQA/astroid/issues/177
if not has_no_context_positional_variadic:
self.add_message(
"no-value-for-parameter",
node=node,
args=(display_name, callable_name),
)
for name in kwparams:
defval, assigned = kwparams[name]
if defval is None and not assigned and not has_no_context_keywords_variadic:
self.add_message("missing-kwoa", node=node, args=(name, callable_name))
|
Detect TypeErrors for unary operands.
|
def visit_unaryop(self, node):
"""Detect TypeErrors for unary operands."""
for error in node.type_errors():
# Let the error customize its output.
self.add_message("invalid-unary-operand-type", args=str(error), node=node)
|
Called when a: class:. astroid. node_classes. Call node is visited.
|
def visit_call(self, node):
"""Called when a :class:`.astroid.node_classes.Call` node is visited.
See :mod:`astroid` for the description of available nodes.
:param node: The node to check.
:type node: astroid.node_classes.Call
"""
if not (
isinstance(node.func, astroid.Attribute)
and isinstance(node.func.expr, astroid.Name)
and node.func.expr.name == self.config.store_locals_indicator
and node.func.attrname == "create"
):
return
in_class = node.frame()
for param in node.args:
in_class.locals[param.name] = node
|
Return an iterator on interfaces implemented by the given class node.
|
def interfaces(node, herited=True, handler_func=_iface_hdlr):
"""Return an iterator on interfaces implemented by the given class node."""
# FIXME: what if __implements__ = (MyIFace, MyParent.__implements__)...
try:
implements = bases.Instance(node).getattr("__implements__")[0]
except exceptions.NotFoundError:
return
if not herited and implements.frame() is not node:
return
found = set()
missing = False
for iface in node_classes.unpack_infer(implements):
if iface is astroid.Uninferable:
missing = True
continue
if iface not in found and handler_func(iface):
found.add(iface)
yield iface
if missing:
raise exceptions.InferenceError()
|
return a Project from a list of files or modules
|
def project_from_files(
files, func_wrapper=_astroid_wrapper, project_name="no name", black_list=("CVS",)
):
"""return a Project from a list of files or modules"""
# build the project representation
astroid_manager = manager.AstroidManager()
project = Project(project_name)
for something in files:
if not os.path.exists(something):
fpath = modutils.file_from_modpath(something.split("."))
elif os.path.isdir(something):
fpath = os.path.join(something, "__init__.py")
else:
fpath = something
ast = func_wrapper(astroid_manager.ast_from_file, fpath)
if ast is None:
continue
# XXX why is first file defining the project.path ?
project.path = project.path or ast.file
project.add_module(ast)
base_name = ast.name
# recurse in package except if __init__ was explicitly given
if ast.package and something.find("__init__") == -1:
# recurse on others packages / modules if this is a package
for fpath in modutils.get_module_files(
os.path.dirname(ast.file), black_list
):
ast = func_wrapper(astroid_manager.ast_from_file, fpath)
if ast is None or ast.name == base_name:
continue
project.add_module(ast)
return project
|
visit a pyreverse. utils. Project node
|
def visit_project(self, node):
"""visit a pyreverse.utils.Project node
* optionally tag the node with a unique id
"""
if self.tag:
node.uid = self.generate_id()
for module in node.modules:
self.visit(module)
|
visit an astroid. Package node
|
def visit_package(self, node):
"""visit an astroid.Package node
* optionally tag the node with a unique id
"""
if self.tag:
node.uid = self.generate_id()
for subelmt in node.values():
self.visit(subelmt)
|
visit an astroid. Module node
|
def visit_module(self, node):
"""visit an astroid.Module node
* set the locals_type mapping
* set the depends mapping
* optionally tag the node with a unique id
"""
if hasattr(node, "locals_type"):
return
node.locals_type = collections.defaultdict(list)
node.depends = []
if self.tag:
node.uid = self.generate_id()
|
visit an astroid. Class node
|
def visit_classdef(self, node):
"""visit an astroid.Class node
* set the locals_type and instance_attrs_type mappings
* set the implements list and build it
* optionally tag the node with a unique id
"""
if hasattr(node, "locals_type"):
return
node.locals_type = collections.defaultdict(list)
if self.tag:
node.uid = self.generate_id()
# resolve ancestors
for baseobj in node.ancestors(recurs=False):
specializations = getattr(baseobj, "specializations", [])
specializations.append(node)
baseobj.specializations = specializations
# resolve instance attributes
node.instance_attrs_type = collections.defaultdict(list)
for assignattrs in node.instance_attrs.values():
for assignattr in assignattrs:
self.handle_assignattr_type(assignattr, node)
# resolve implemented interface
try:
node.implements = list(interfaces(node, self.inherited_interfaces))
except astroid.InferenceError:
node.implements = ()
|
visit an astroid. Function node
|
def visit_functiondef(self, node):
"""visit an astroid.Function node
* set the locals_type mapping
* optionally tag the node with a unique id
"""
if hasattr(node, "locals_type"):
return
node.locals_type = collections.defaultdict(list)
if self.tag:
node.uid = self.generate_id()
|
visit an astroid. AssignName node
|
def visit_assignname(self, node):
"""visit an astroid.AssignName node
handle locals_type
"""
# avoid double parsing done by different Linkers.visit
# running over the same project:
if hasattr(node, "_handled"):
return
node._handled = True
if node.name in node.frame():
frame = node.frame()
else:
# the name has been defined as 'global' in the frame and belongs
# there.
frame = node.root()
try:
if not hasattr(frame, "locals_type"):
# If the frame doesn't have a locals_type yet,
# it means it wasn't yet visited. Visit it now
# to add what's missing from it.
if isinstance(frame, astroid.ClassDef):
self.visit_classdef(frame)
elif isinstance(frame, astroid.FunctionDef):
self.visit_functiondef(frame)
else:
self.visit_module(frame)
current = frame.locals_type[node.name]
values = set(node.infer())
frame.locals_type[node.name] = list(set(current) | values)
except astroid.InferenceError:
pass
|
handle an astroid. assignattr node
|
def handle_assignattr_type(node, parent):
"""handle an astroid.assignattr node
handle instance_attrs_type
"""
try:
values = set(node.infer())
current = set(parent.instance_attrs_type[node.attrname])
parent.instance_attrs_type[node.attrname] = list(current | values)
except astroid.InferenceError:
pass
|
visit an astroid. Import node
|
def visit_import(self, node):
"""visit an astroid.Import node
resolve module dependencies
"""
context_file = node.root().file
for name in node.names:
relative = modutils.is_relative(name[0], context_file)
self._imported_module(node, name[0], relative)
|
visit an astroid. ImportFrom node
|
def visit_importfrom(self, node):
"""visit an astroid.ImportFrom node
resolve module dependencies
"""
basename = node.modname
context_file = node.root().file
if context_file is not None:
relative = modutils.is_relative(basename, context_file)
else:
relative = False
for name in node.names:
if name[0] == "*":
continue
# analyze dependencies
fullname = "%s.%s" % (basename, name[0])
if fullname.find(".") > -1:
try:
# TODO: don't use get_module_part,
# missing package precedence
fullname = modutils.get_module_part(fullname, context_file)
except ImportError:
continue
if fullname != basename:
self._imported_module(node, fullname, relative)
|
return true if the module should be added to dependencies
|
def compute_module(self, context_name, mod_path):
"""return true if the module should be added to dependencies"""
package_dir = os.path.dirname(self.project.path)
if context_name == mod_path:
return 0
if modutils.is_standard_module(mod_path, (package_dir,)):
return 1
return 0
|
Notify an imported module used to analyze dependencies
|
def _imported_module(self, node, mod_path, relative):
"""Notify an imported module, used to analyze dependencies"""
module = node.root()
context_name = module.name
if relative:
mod_path = "%s.%s" % (".".join(context_name.split(".")[:-1]), mod_path)
if self.compute_module(context_name, mod_path):
# handle dependencies
if not hasattr(module, "depends"):
module.depends = []
mod_paths = module.depends
if mod_path not in mod_paths:
mod_paths.append(mod_path)
|
Return true if the give object ( maybe an instance or class ) implements the interface.
|
def implements(obj, interface):
"""Return true if the give object (maybe an instance or class) implements
the interface.
"""
kimplements = getattr(obj, "__implements__", ())
if not isinstance(kimplements, (list, tuple)):
kimplements = (kimplements,)
for implementedinterface in kimplements:
if issubclass(implementedinterface, interface):
return True
return False
|
return ansi escape code corresponding to color and style
|
def _get_ansi_code(color=None, style=None):
"""return ansi escape code corresponding to color and style
:type color: str or None
:param color:
the color name (see `ANSI_COLORS` for available values)
or the color number when 256 colors are available
:type style: str or None
:param style:
style string (see `ANSI_COLORS` for available values). To get
several style effects at the same time, use a coma as separator.
:raise KeyError: if an unexistent color or style identifier is given
:rtype: str
:return: the built escape code
"""
ansi_code = []
if style:
style_attrs = utils._splitstrip(style)
for effect in style_attrs:
ansi_code.append(ANSI_STYLES[effect])
if color:
if color.isdigit():
ansi_code.extend(["38", "5"])
ansi_code.append(color)
else:
ansi_code.append(ANSI_COLORS[color])
if ansi_code:
return ANSI_PREFIX + ";".join(ansi_code) + ANSI_END
return ""
|
colorize message by wrapping it with ansi escape codes
|
def colorize_ansi(msg, color=None, style=None):
"""colorize message by wrapping it with ansi escape codes
:type msg: str or unicode
:param msg: the message string to colorize
:type color: str or None
:param color:
the color identifier (see `ANSI_COLORS` for available values)
:type style: str or None
:param style:
style string (see `ANSI_COLORS` for available values). To get
several style effects at the same time, use a coma as separator.
:raise KeyError: if an unexistent color or style identifier is given
:rtype: str or unicode
:return: the ansi escaped string
"""
# If both color and style are not defined, then leave the text as is
if color is None and style is None:
return msg
escape_code = _get_ansi_code(color, style)
# If invalid (or unknown) color, don't wrap msg with ansi codes
if escape_code:
return "%s%s%s" % (escape_code, msg, ANSI_RESET)
return msg
|
Register the reporter classes with the linter.
|
def register(linter):
"""Register the reporter classes with the linter."""
linter.register_reporter(TextReporter)
linter.register_reporter(ParseableTextReporter)
linter.register_reporter(VSTextReporter)
linter.register_reporter(ColorizedTextReporter)
|
manage message of different type and in the context of path
|
def handle_message(self, msg):
"""manage message of different type and in the context of path"""
if msg.module not in self._modules:
if msg.module:
self.writeln("************* Module %s" % msg.module)
self._modules.add(msg.module)
else:
self.writeln("************* ")
self.write_message(msg)
|
launch layouts display
|
def _display(self, layout):
"""launch layouts display"""
print(file=self.out)
TextWriter().format(layout, self.out)
|
manage message of different types and colorize output using ansi escape codes
|
def handle_message(self, msg):
"""manage message of different types, and colorize output
using ansi escape codes
"""
if msg.module not in self._modules:
color, style = self._get_decoration("S")
if msg.module:
modsep = colorize_ansi(
"************* Module %s" % msg.module, color, style
)
else:
modsep = colorize_ansi("************* %s" % msg.module, color, style)
self.writeln(modsep)
self._modules.add(msg.module)
color, style = self._get_decoration(msg.C)
msg = msg._replace(
**{
attr: colorize_ansi(getattr(msg, attr), color, style)
for attr in ("msg", "symbol", "category", "C")
}
)
self.write_message(msg)
|
open a vcg graph
|
def open_graph(self, **args):
"""open a vcg graph
"""
self._stream.write("%sgraph:{\n" % self._indent)
self._inc_indent()
self._write_attributes(GRAPH_ATTRS, **args)
|
draw a node
|
def node(self, title, **args):
"""draw a node
"""
self._stream.write('%snode: {title:"%s"' % (self._indent, title))
self._write_attributes(NODE_ATTRS, **args)
self._stream.write("}\n")
|
draw an edge from a node to another.
|
def edge(self, from_node, to_node, edge_type="", **args):
"""draw an edge from a node to another.
"""
self._stream.write(
'%s%sedge: {sourcename:"%s" targetname:"%s"'
% (self._indent, edge_type, from_node, to_node)
)
self._write_attributes(EDGE_ATTRS, **args)
self._stream.write("}\n")
|
write graph node or edge attributes
|
def _write_attributes(self, attributes_dict, **args):
"""write graph, node or edge attributes
"""
for key, value in args.items():
try:
_type = attributes_dict[key]
except KeyError:
raise Exception(
"""no such attribute %s
possible attributes are %s"""
% (key, attributes_dict.keys())
)
if not _type:
self._stream.write('%s%s:"%s"\n' % (self._indent, key, value))
elif _type == 1:
self._stream.write("%s%s:%s\n" % (self._indent, key, int(value)))
elif value in _type:
self._stream.write("%s%s:%s\n" % (self._indent, key, value))
else:
raise Exception(
"""value %s isn\'t correct for attribute %s
correct values are %s"""
% (value, key, _type)
)
|
Given a list of format specifiers returns the final access path ( e. g. a. b. c [ 0 ] [ 1 ] ).
|
def get_access_path(key, parts):
""" Given a list of format specifiers, returns
the final access path (e.g. a.b.c[0][1]).
"""
path = []
for is_attribute, specifier in parts:
if is_attribute:
path.append(".{}".format(specifier))
else:
path.append("[{!r}]".format(specifier))
return str(key) + "".join(path)
|
required method to auto register this checker
|
def register(linter):
"""required method to auto register this checker """
linter.register_checker(StringFormatChecker(linter))
linter.register_checker(StringConstantChecker(linter))
|
Mostly replicate ast. literal_eval ( token ) manually to avoid any performance hit. This supports f - strings contrary to ast. literal_eval. We have to support all string literal notations: https:// docs. python. org/ 3/ reference/ lexical_analysis. html#string - and - bytes - literals
|
def str_eval(token):
"""
Mostly replicate `ast.literal_eval(token)` manually to avoid any performance hit.
This supports f-strings, contrary to `ast.literal_eval`.
We have to support all string literal notations:
https://docs.python.org/3/reference/lexical_analysis.html#string-and-bytes-literals
"""
if token[0:2].lower() in ("fr", "rf"):
token = token[2:]
elif token[0].lower() in ("r", "u", "f"):
token = token[1:]
if token[0:3] in ('"""', "'''"):
return token[3:-3]
return token[1:-1]
|
Check the new string formatting.
|
def _check_new_format(self, node, func):
""" Check the new string formatting. """
# TODO: skip (for now) format nodes which don't have
# an explicit string on the left side of the format operation.
# We do this because our inference engine can't properly handle
# redefinitions of the original string.
# For more details, see issue 287.
#
# Note that there may not be any left side at all, if the format method
# has been assigned to another variable. See issue 351. For example:
#
# fmt = 'some string {}'.format
# fmt('arg')
if isinstance(node.func, astroid.Attribute) and not isinstance(
node.func.expr, astroid.Const
):
return
if node.starargs or node.kwargs:
return
try:
strnode = next(func.bound.infer())
except astroid.InferenceError:
return
if not (isinstance(strnode, astroid.Const) and isinstance(strnode.value, str)):
return
try:
call_site = CallSite.from_call(node)
except astroid.InferenceError:
return
try:
fields, num_args, manual_pos = utils.parse_format_method_string(
strnode.value
)
except utils.IncompleteFormatString:
self.add_message("bad-format-string", node=node)
return
positional_arguments = call_site.positional_arguments
named_arguments = call_site.keyword_arguments
named_fields = {field[0] for field in fields if isinstance(field[0], str)}
if num_args and manual_pos:
self.add_message("format-combined-specification", node=node)
return
check_args = False
# Consider "{[0]} {[1]}" as num_args.
num_args += sum(1 for field in named_fields if field == "")
if named_fields:
for field in named_fields:
if field and field not in named_arguments:
self.add_message(
"missing-format-argument-key", node=node, args=(field,)
)
for field in named_arguments:
if field not in named_fields:
self.add_message(
"unused-format-string-argument", node=node, args=(field,)
)
# num_args can be 0 if manual_pos is not.
num_args = num_args or manual_pos
if positional_arguments or num_args:
empty = any(True for field in named_fields if field == "")
if named_arguments or empty:
# Verify the required number of positional arguments
# only if the .format got at least one keyword argument.
# This means that the format strings accepts both
# positional and named fields and we should warn
# when one of the them is missing or is extra.
check_args = True
else:
check_args = True
if check_args:
# num_args can be 0 if manual_pos is not.
num_args = num_args or manual_pos
if len(positional_arguments) > num_args:
self.add_message("too-many-format-args", node=node)
elif len(positional_arguments) < num_args:
self.add_message("too-few-format-args", node=node)
self._detect_vacuous_formatting(node, positional_arguments)
self._check_new_format_specifiers(node, fields, named_arguments)
|
Check attribute and index access in the format string ( { 0. a } and { 0 [ a ] } ).
|
def _check_new_format_specifiers(self, node, fields, named):
"""
Check attribute and index access in the format
string ("{0.a}" and "{0[a]}").
"""
for key, specifiers in fields:
# Obtain the argument. If it can't be obtained
# or infered, skip this check.
if key == "":
# {[0]} will have an unnamed argument, defaulting
# to 0. It will not be present in `named`, so use the value
# 0 for it.
key = 0
if isinstance(key, numbers.Number):
try:
argname = utils.get_argument_from_call(node, key)
except utils.NoSuchArgumentError:
continue
else:
if key not in named:
continue
argname = named[key]
if argname in (astroid.Uninferable, None):
continue
try:
argument = next(argname.infer())
except astroid.InferenceError:
continue
if not specifiers or argument is astroid.Uninferable:
# No need to check this key if it doesn't
# use attribute / item access
continue
if argument.parent and isinstance(argument.parent, astroid.Arguments):
# Ignore any object coming from an argument,
# because we can't infer its value properly.
continue
previous = argument
parsed = []
for is_attribute, specifier in specifiers:
if previous is astroid.Uninferable:
break
parsed.append((is_attribute, specifier))
if is_attribute:
try:
previous = previous.getattr(specifier)[0]
except astroid.NotFoundError:
if (
hasattr(previous, "has_dynamic_getattr")
and previous.has_dynamic_getattr()
):
# Don't warn if the object has a custom __getattr__
break
path = get_access_path(key, parsed)
self.add_message(
"missing-format-attribute",
args=(specifier, path),
node=node,
)
break
else:
warn_error = False
if hasattr(previous, "getitem"):
try:
previous = previous.getitem(astroid.Const(specifier))
except (
astroid.AstroidIndexError,
astroid.AstroidTypeError,
astroid.AttributeInferenceError,
):
warn_error = True
except astroid.InferenceError:
break
if previous is astroid.Uninferable:
break
else:
try:
# Lookup __getitem__ in the current node,
# but skip further checks, because we can't
# retrieve the looked object
previous.getattr("__getitem__")
break
except astroid.NotFoundError:
warn_error = True
if warn_error:
path = get_access_path(key, parsed)
self.add_message(
"invalid-format-index", args=(specifier, path), node=node
)
break
try:
previous = next(previous.infer())
except astroid.InferenceError:
# can't check further if we can't infer it
break
|
check for bad escapes in a non - raw string.
|
def process_non_raw_string_token(self, prefix, string_body, start_row):
"""check for bad escapes in a non-raw string.
prefix: lowercase string of eg 'ur' string prefix markers.
string_body: the un-parsed body of the string, not including the quote
marks.
start_row: integer line number in the source.
"""
# Walk through the string; if we see a backslash then escape the next
# character, and skip over it. If we see a non-escaped character,
# alert, and continue.
#
# Accept a backslash when it escapes a backslash, or a quote, or
# end-of-line, or one of the letters that introduce a special escape
# sequence <http://docs.python.org/reference/lexical_analysis.html>
#
# TODO(mbp): Maybe give a separate warning about the rarely-used
# \a \b \v \f?
#
# TODO(mbp): We could give the column of the problem character, but
# add_message doesn't seem to have a way to pass it through at present.
i = 0
while True:
i = string_body.find("\\", i)
if i == -1:
break
# There must be a next character; having a backslash at the end
# of the string would be a SyntaxError.
next_char = string_body[i + 1]
match = string_body[i : i + 2]
if next_char in self.UNICODE_ESCAPE_CHARACTERS:
if "u" in prefix:
pass
elif (_PY3K or self._unicode_literals) and "b" not in prefix:
pass # unicode by default
else:
self.add_message(
"anomalous-unicode-escape-in-string",
line=start_row,
args=(match,),
)
elif next_char not in self.ESCAPE_CHARACTERS:
self.add_message(
"anomalous-backslash-in-string", line=start_row, args=(match,)
)
# Whether it was a valid escape or not, backslash followed by
# another character can always be consumed whole: the second
# character can never be the start of a new backslash escape.
i += 2
|
display a section as text
|
def visit_section(self, layout):
"""display a section as text
"""
self.section += 1
self.writeln()
self.format_children(layout)
self.section -= 1
self.writeln()
|
Display an evaluation section as a text.
|
def visit_evaluationsection(self, layout):
"""Display an evaluation section as a text."""
self.section += 1
self.format_children(layout)
self.section -= 1
self.writeln()
|
display a table as text
|
def visit_table(self, layout):
"""display a table as text"""
table_content = self.get_table_content(layout)
# get columns width
cols_width = [0] * len(table_content[0])
for row in table_content:
for index, col in enumerate(row):
cols_width[index] = max(cols_width[index], len(col))
self.default_table(layout, table_content, cols_width)
self.writeln()
|
format a table
|
def default_table(self, layout, table_content, cols_width):
"""format a table"""
cols_width = [size + 1 for size in cols_width]
format_strings = " ".join(["%%-%ss"] * len(cols_width))
format_strings = format_strings % tuple(cols_width)
format_strings = format_strings.split(" ")
table_linesep = "\n+" + "+".join(["-" * w for w in cols_width]) + "+\n"
headsep = "\n+" + "+".join(["=" * w for w in cols_width]) + "+\n"
# FIXME: layout.cheaders
self.write(table_linesep)
for index, line in enumerate(table_content):
self.write("|")
for line_index, at_index in enumerate(line):
self.write(format_strings[line_index] % at_index)
self.write("|")
if index == 0 and layout.rheaders:
self.write(headsep)
else:
self.write(table_linesep)
|
display a verbatim layout as text ( so difficult ; )
|
def visit_verbatimtext(self, layout):
"""display a verbatim layout as text (so difficult ;)
"""
self.writeln("::\n")
for line in layout.data.splitlines():
self.writeln(" " + line)
self.writeln()
|
Register the old ID and symbol for a warning that was renamed.
|
def add_renamed_message(self, old_id, old_symbol, new_symbol):
"""Register the old ID and symbol for a warning that was renamed.
This allows users to keep using the old ID/symbol in suppressions.
"""
message_definition = self.get_message_definitions(new_symbol)[0]
message_definition.old_names.append((old_id, old_symbol))
self._register_alternative_name(message_definition, old_id, old_symbol)
|
Register all messages from a checker.
|
def register_messages_from_checker(self, checker):
"""Register all messages from a checker.
:param BaseChecker checker:
"""
checker.check_consistency()
for message in checker.messages:
self.register_message(message)
|
Register a MessageDefinition with consistency in mind.
|
def register_message(self, message):
"""Register a MessageDefinition with consistency in mind.
:param MessageDefinition message: The message definition being added.
"""
self._check_id_and_symbol_consistency(message.msgid, message.symbol)
self._check_symbol(message.msgid, message.symbol)
self._check_msgid(message.msgid, message.symbol)
for old_name in message.old_names:
self._check_symbol(message.msgid, old_name[1])
self._messages_definitions[message.symbol] = message
self._register_alternative_name(message, message.msgid, message.symbol)
for old_id, old_symbol in message.old_names:
self._register_alternative_name(message, old_id, old_symbol)
self._msgs_by_category[message.msgid[0]].append(message.msgid)
|
helper for register_message ()
|
def _register_alternative_name(self, msg, msgid, symbol):
"""helper for register_message()"""
self._check_id_and_symbol_consistency(msgid, symbol)
self._alternative_names[msgid] = msg
self._alternative_names[symbol] = msg
|
Check that a symbol is not already used.
|
def _check_symbol(self, msgid, symbol):
"""Check that a symbol is not already used. """
other_message = self._messages_definitions.get(symbol)
if other_message:
self._raise_duplicate_msg_id(symbol, msgid, other_message.msgid)
else:
alternative_msgid = None
alternative_message = self._alternative_names.get(symbol)
if alternative_message:
if alternative_message.symbol == symbol:
alternative_msgid = alternative_message.msgid
else:
for old_msgid, old_symbol in alternative_message.old_names:
if old_symbol == symbol:
alternative_msgid = old_msgid
break
if msgid != alternative_msgid:
self._raise_duplicate_msg_id(symbol, msgid, alternative_msgid)
|
Raise an error when a symbol is duplicated.
|
def _raise_duplicate_symbol(msgid, symbol, other_symbol):
"""Raise an error when a symbol is duplicated.
:param str msgid: The msgid corresponding to the symbols
:param str symbol: Offending symbol
:param str other_symbol: Other offending symbol
:raises InvalidMessageError: when a symbol is duplicated.
"""
symbols = [symbol, other_symbol]
symbols.sort()
error_message = "Message id '{msgid}' cannot have both ".format(msgid=msgid)
error_message += "'{other_symbol}' and '{symbol}' as symbolic name.".format(
other_symbol=symbols[0], symbol=symbols[1]
)
raise InvalidMessageError(error_message)
|
Raise an error when a msgid is duplicated.
|
def _raise_duplicate_msg_id(symbol, msgid, other_msgid):
"""Raise an error when a msgid is duplicated.
:param str symbol: The symbol corresponding to the msgids
:param str msgid: Offending msgid
:param str other_msgid: Other offending msgid
:raises InvalidMessageError: when a msgid is duplicated.
"""
msgids = [msgid, other_msgid]
msgids.sort()
error_message = "Message symbol '{symbol}' cannot be used for ".format(
symbol=symbol
)
error_message += "'{other_msgid}' and '{msgid}' at the same time.".format(
other_msgid=msgids[0], msgid=msgids[1]
)
raise InvalidMessageError(error_message)
|
Returns the Message object for this message.
|
def get_message_definitions(self, msgid_or_symbol: str) -> list:
"""Returns the Message object for this message.
:param str msgid_or_symbol: msgid_or_symbol may be either a numeric or symbolic id.
:raises UnknownMessageError: if the message id is not defined.
:rtype: List of MessageDefinition
:return: A message definition corresponding to msgid_or_symbol
"""
if msgid_or_symbol[1:].isdigit():
msgid_or_symbol = msgid_or_symbol.upper()
for source in (self._alternative_names, self._messages_definitions):
try:
return [source[msgid_or_symbol]]
except KeyError:
pass
error_msg = "No such message id or symbol '{msgid_or_symbol}'.".format(
msgid_or_symbol=msgid_or_symbol
)
raise UnknownMessageError(error_msg)
|
Generates a user - consumable representation of a message.
|
def get_msg_display_string(self, msgid):
"""Generates a user-consumable representation of a message.
Can be just the message ID or the ID and the symbol.
"""
message_definitions = self.get_message_definitions(msgid)
if len(message_definitions) == 1:
return repr(message_definitions[0].symbol)
return repr([md.symbol for md in message_definitions])
|
Display help messages for the given message identifiers
|
def help_message(self, msgids):
"""Display help messages for the given message identifiers"""
for msgid in msgids:
try:
for message_definition in self.get_message_definitions(msgid):
print(message_definition.format_help(checkerref=True))
print("")
except UnknownMessageError as ex:
print(ex)
print("")
continue
|
Output full messages list documentation in ReST format.
|
def list_messages(self):
"""Output full messages list documentation in ReST format. """
messages = sorted(self._messages_definitions.values(), key=lambda m: m.msgid)
for message in messages:
if not message.may_be_emitted():
continue
print(message.format_help(checkerref=False))
print("")
|
Required method to auto register this checker.
|
def register(linter):
"""Required method to auto register this checker.
:param linter: Main interface object for Pylint plugins
:type linter: Pylint object
"""
warnings.warn(
"This plugin is deprecated, use pylint.extensions.docparams instead.",
DeprecationWarning,
)
linter.register_checker(docparams.DocstringParameterChecker(linter))
|
Output full documentation in ReST format for all extension modules
|
def builder_inited(app):
"""Output full documentation in ReST format for all extension modules"""
# PACKAGE/docs/exts/pylint_extensions.py --> PACKAGE/
base_path = os.path.dirname(
os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
)
# PACKAGE/ --> PACKAGE/pylint/extensions
ext_path = os.path.join(base_path, "pylint", "extensions")
modules = []
doc_files = {}
for filename in os.listdir(ext_path):
name, ext = os.path.splitext(filename)
if name[0] == "_" or name in DEPRECATED_MODULES:
continue
if ext == ".py":
modules.append("pylint.extensions.%s" % name)
elif ext == ".rst":
doc_files["pylint.extensions." + name] = os.path.join(ext_path, filename)
modules.sort()
if not modules:
sys.exit("No Pylint extensions found?")
linter = PyLinter()
linter.load_plugin_modules(modules)
extensions_doc = os.path.join(
base_path, "doc", "technical_reference", "extensions.rst"
)
with open(extensions_doc, "w") as stream:
stream.write("Optional Pylint checkers in the extensions module\n")
stream.write("=================================================\n\n")
stream.write("Pylint provides the following optional plugins:\n\n")
for module in modules:
stream.write("- :ref:`{}`\n".format(module))
stream.write("\n")
stream.write(
"You can activate any or all of these extensions "
"by adding a ``load-plugins`` line to the ``MASTER`` "
"section of your ``.pylintrc``, for example::\n"
)
stream.write(
"\n load-plugins=pylint.extensions.docparams,"
"pylint.extensions.docstyle\n\n"
)
by_module = get_plugins_info(linter, doc_files)
for module, info in sorted(by_module.items()):
linter._print_checker_doc(info["name"], info, stream=stream)
|
run pylint
|
def run_pylint():
"""run pylint"""
from pylint.lint import Run
try:
Run(sys.argv[1:])
except KeyboardInterrupt:
sys.exit(1)
|
Use sched_affinity if available for virtualized or containerized environments.
|
def _cpu_count() -> int:
"""Use sched_affinity if available for virtualized or containerized environments."""
sched_getaffinity = getattr(os, "sched_getaffinity", None)
# pylint: disable=not-callable,using-constant-test
if sched_getaffinity:
return len(sched_getaffinity(0))
if multiprocessing:
return multiprocessing.cpu_count()
return 1
|
make total errors/ warnings report
|
def report_total_messages_stats(sect, stats, previous_stats):
"""make total errors / warnings report"""
lines = ["type", "number", "previous", "difference"]
lines += checkers.table_lines_from_stats(
stats, previous_stats, ("convention", "refactor", "warning", "error")
)
sect.append(report_nodes.Table(children=lines, cols=4, rheaders=1))
|
make messages type report
|
def report_messages_stats(sect, stats, _):
"""make messages type report"""
if not stats["by_msg"]:
# don't print this report when we didn't detected any errors
raise exceptions.EmptyReportError()
in_order = sorted(
[
(value, msg_id)
for msg_id, value in stats["by_msg"].items()
if not msg_id.startswith("I")
]
)
in_order.reverse()
lines = ("message id", "occurrences")
for value, msg_id in in_order:
lines += (msg_id, str(value))
sect.append(report_nodes.Table(children=lines, cols=2, rheaders=1))
|
make errors/ warnings by modules report
|
def report_messages_by_module_stats(sect, stats, _):
"""make errors / warnings by modules report"""
if len(stats["by_module"]) == 1:
# don't print this report when we are analysing a single module
raise exceptions.EmptyReportError()
by_mod = collections.defaultdict(dict)
for m_type in ("fatal", "error", "warning", "refactor", "convention"):
total = stats[m_type]
for module in stats["by_module"].keys():
mod_total = stats["by_module"][module][m_type]
if total == 0:
percent = 0
else:
percent = float((mod_total) * 100) / total
by_mod[module][m_type] = percent
sorted_result = []
for module, mod_info in by_mod.items():
sorted_result.append(
(
mod_info["error"],
mod_info["warning"],
mod_info["refactor"],
mod_info["convention"],
module,
)
)
sorted_result.sort()
sorted_result.reverse()
lines = ["module", "error", "warning", "refactor", "convention"]
for line in sorted_result:
# Don't report clean modules.
if all(entry == 0 for entry in line[:-1]):
continue
lines.append(line[-1])
for val in line[:-1]:
lines.append("%.2f" % val)
if len(lines) == 5:
raise exceptions.EmptyReportError()
sect.append(report_nodes.Table(children=lines, cols=5, rheaders=1))
|
look for some options ( keys of <search_for > ) which have to be processed before others
|
def preprocess_options(args, search_for):
"""look for some options (keys of <search_for>) which have to be processed
before others
values of <search_for> are callback functions to call when the option is
found
"""
i = 0
while i < len(args):
arg = args[i]
if arg.startswith("--"):
try:
option, val = arg[2:].split("=", 1)
except ValueError:
option, val = arg[2:], None
try:
cb, takearg = search_for[option]
except KeyError:
i += 1
else:
del args[i]
if takearg and val is None:
if i >= len(args) or args[i].startswith("-"):
msg = "Option %s expects a value" % option
raise ArgumentPreprocessingError(msg)
val = args[i]
del args[i]
elif not takearg and val is not None:
msg = "Option %s doesn't expects a value" % option
raise ArgumentPreprocessingError(msg)
cb(option, val)
else:
i += 1
|
Prepare sys. path for running the linter checks.
|
def fix_import_path(args):
"""Prepare sys.path for running the linter checks.
Within this context, each of the given arguments is importable.
Paths are added to sys.path in corresponding order to the arguments.
We avoid adding duplicate directories to sys.path.
`sys.path` is reset to its original value upon exiting this context.
"""
orig = list(sys.path)
changes = []
for arg in args:
path = _get_python_path(arg)
if path in changes:
continue
else:
changes.append(path)
sys.path[:] = changes + ["."] + sys.path
try:
yield
finally:
sys.path[:] = orig
|
take a list of module names which are pylint plugins and load and register them
|
def load_plugin_modules(self, modnames):
"""take a list of module names which are pylint plugins and load
and register them
"""
for modname in modnames:
if modname in self._dynamic_plugins:
continue
self._dynamic_plugins.add(modname)
module = modutils.load_module_from_name(modname)
module.register(self)
|
Call the configuration hook for plugins
|
def load_plugin_configuration(self):
"""Call the configuration hook for plugins
This walks through the list of plugins, grabs the "load_configuration"
hook, if exposed, and calls it to allow plugins to configure specific
settings.
"""
for modname in self._dynamic_plugins:
module = modutils.load_module_from_name(modname)
if hasattr(module, "load_configuration"):
module.load_configuration(self)
|
overridden from config. OptionsProviderMixin to handle some special options
|
def set_option(self, optname, value, action=None, optdict=None):
"""overridden from config.OptionsProviderMixin to handle some
special options
"""
if optname in self._options_methods or optname in self._bw_options_methods:
if value:
try:
meth = self._options_methods[optname]
except KeyError:
meth = self._bw_options_methods[optname]
warnings.warn(
"%s is deprecated, replace it by %s"
% (optname, optname.split("-")[0]),
DeprecationWarning,
)
value = utils._check_csv(value)
if isinstance(value, (list, tuple)):
for _id in value:
meth(_id, ignore_unknown=True)
else:
meth(value)
return # no need to call set_option, disable/enable methods do it
elif optname == "output-format":
self._reporter_name = value
# If the reporters are already available, load
# the reporter class.
if self._reporters:
self._load_reporter()
try:
checkers.BaseTokenChecker.set_option(self, optname, value, action, optdict)
except config.UnsupportedAction:
print("option %s can't be read from config file" % optname, file=sys.stderr)
|
register a new checker
|
def register_checker(self, checker):
"""register a new checker
checker is an object implementing IRawChecker or / and IAstroidChecker
"""
assert checker.priority <= 0, "checker priority can't be >= 0"
self._checkers[checker.name].append(checker)
for r_id, r_title, r_cb in checker.reports:
self.register_report(r_id, r_title, r_cb, checker)
self.register_options_provider(checker)
if hasattr(checker, "msgs"):
self.msgs_store.register_messages_from_checker(checker)
checker.load_defaults()
# Register the checker, but disable all of its messages.
# TODO(cpopa): we should have a better API for this.
if not getattr(checker, "enabled", True):
self.disable(checker.name)
|
disable all reporters
|
def disable_reporters(self):
"""disable all reporters"""
for _reporters in self._reports.values():
for report_id, _, _ in _reporters:
self.disable_report(report_id)
|
error mode: enable only errors ; no reports no persistent
|
def error_mode(self):
"""error mode: enable only errors; no reports, no persistent"""
self._error_mode = True
self.disable_noerror_messages()
self.disable("miscellaneous")
if self._python3_porting_mode:
self.disable("all")
for msg_id in self._checker_messages("python3"):
if msg_id.startswith("E"):
self.enable(msg_id)
config_parser = self.cfgfile_parser
if config_parser.has_option("MESSAGES CONTROL", "disable"):
value = config_parser.get("MESSAGES CONTROL", "disable")
self.global_set_option("disable", value)
else:
self.disable("python3")
self.set_option("reports", False)
self.set_option("persistent", False)
self.set_option("score", False)
|
Disable all other checkers and enable Python 3 warnings.
|
def python3_porting_mode(self):
"""Disable all other checkers and enable Python 3 warnings."""
self.disable("all")
self.enable("python3")
if self._error_mode:
# The error mode was activated, using the -E flag.
# So we'll need to enable only the errors from the
# Python 3 porting checker.
for msg_id in self._checker_messages("python3"):
if msg_id.startswith("E"):
self.enable(msg_id)
else:
self.disable(msg_id)
config_parser = self.cfgfile_parser
if config_parser.has_option("MESSAGES CONTROL", "disable"):
value = config_parser.get("MESSAGES CONTROL", "disable")
self.global_set_option("disable", value)
self._python3_porting_mode = True
|
process tokens from the current module to search for module/ block level options
|
def process_tokens(self, tokens):
"""process tokens from the current module to search for module/block
level options
"""
control_pragmas = {"disable", "enable"}
for (tok_type, content, start, _, _) in tokens:
if tok_type != tokenize.COMMENT:
continue
match = OPTION_RGX.search(content)
if match is None:
continue
first_group = match.group(1)
if (
first_group.strip() == "disable-all"
or first_group.strip() == "skip-file"
):
if first_group.strip() == "disable-all":
self.add_message(
"deprecated-pragma",
line=start[0],
args=("disable-all", "skip-file"),
)
self.add_message("file-ignored", line=start[0])
self._ignore_file = True
return
try:
opt, value = first_group.split("=", 1)
except ValueError:
self.add_message(
"bad-inline-option", args=first_group.strip(), line=start[0]
)
continue
opt = opt.strip()
if opt in self._options_methods or opt in self._bw_options_methods:
try:
meth = self._options_methods[opt]
except KeyError:
meth = self._bw_options_methods[opt]
# found a "(dis|en)able-msg" pragma deprecated suppression
self.add_message(
"deprecated-pragma",
line=start[0],
args=(opt, opt.replace("-msg", "")),
)
for msgid in utils._splitstrip(value):
# Add the line where a control pragma was encountered.
if opt in control_pragmas:
self._pragma_lineno[msgid] = start[0]
try:
if (opt, msgid) == ("disable", "all"):
self.add_message(
"deprecated-pragma",
line=start[0],
args=("disable=all", "skip-file"),
)
self.add_message("file-ignored", line=start[0])
self._ignore_file = True
return
meth(msgid, "module", start[0])
except exceptions.UnknownMessageError:
self.add_message("bad-option-value", args=msgid, line=start[0])
else:
self.add_message("unrecognized-inline-option", args=opt, line=start[0])
|
return all available checkers as a list
|
def get_checkers(self):
"""return all available checkers as a list"""
return [self] + [
c
for _checkers in self._checkers.values()
for c in _checkers
if c is not self
]
|
Get all the checker names that this linter knows about.
|
def get_checker_names(self):
"""Get all the checker names that this linter knows about."""
current_checkers = self.get_checkers()
return sorted(
{check.name for check in current_checkers if check.name != "master"}
)
|
return checkers needed for activated messages and reports
|
def prepare_checkers(self):
"""return checkers needed for activated messages and reports"""
if not self.config.reports:
self.disable_reporters()
# get needed checkers
neededcheckers = [self]
for checker in self.get_checkers()[1:]:
messages = {msg for msg in checker.msgs if self.is_message_enabled(msg)}
if messages or any(self.report_is_enabled(r[0]) for r in checker.reports):
neededcheckers.append(checker)
# Sort checkers by priority
neededcheckers = sorted(
neededcheckers, key=operator.attrgetter("priority"), reverse=True
)
return neededcheckers
|
main checking entry: check a list of files or modules from their name.
|
def check(self, files_or_modules):
"""main checking entry: check a list of files or modules from their
name.
"""
# initialize msgs_state now that all messages have been registered into
# the store
for msg in self.msgs_store.messages:
if not msg.may_be_emitted():
self._msgs_state[msg.msgid] = False
if not isinstance(files_or_modules, (list, tuple)):
files_or_modules = (files_or_modules,)
if self.config.jobs == 1:
self._do_check(files_or_modules)
else:
self._parallel_check(files_or_modules)
|
get modules and errors from a list of modules and handle errors
|
def expand_files(self, modules):
"""get modules and errors from a list of modules and handle errors
"""
result, errors = utils.expand_modules(
modules, self.config.black_list, self.config.black_list_re
)
for error in errors:
message = modname = error["mod"]
key = error["key"]
self.set_current_module(modname)
if key == "fatal":
message = str(error["ex"]).replace(os.getcwd() + os.sep, "")
self.add_message(key, args=message)
return result
|
set the name of the currently analyzed module and init statistics for it
|
def set_current_module(self, modname, filepath=None):
"""set the name of the currently analyzed module and
init statistics for it
"""
if not modname and filepath is None:
return
self.reporter.on_set_current_module(modname, filepath)
self.current_name = modname
self.current_file = filepath or modname
self.stats["by_module"][modname] = {}
self.stats["by_module"][modname]["statement"] = 0
for msg_cat in MSG_TYPES.values():
self.stats["by_module"][modname][msg_cat] = 0
|
return an ast ( roid ) representation for a module
|
def get_ast(self, filepath, modname):
"""return an ast(roid) representation for a module"""
try:
return MANAGER.ast_from_file(filepath, modname, source=True)
except astroid.AstroidSyntaxError as ex:
# pylint: disable=no-member
self.add_message(
"syntax-error", line=getattr(ex.error, "lineno", 0), args=str(ex.error)
)
except astroid.AstroidBuildingException as ex:
self.add_message("parse-error", args=ex)
except Exception as ex:
import traceback
traceback.print_exc()
self.add_message("astroid-error", args=(ex.__class__, ex))
|
Check a module from its astroid representation.
|
def check_astroid_module(self, ast_node, walker, rawcheckers, tokencheckers):
"""Check a module from its astroid representation."""
try:
tokens = utils.tokenize_module(ast_node)
except tokenize.TokenError as ex:
self.add_message("syntax-error", line=ex.args[1][0], args=ex.args[0])
return None
if not ast_node.pure_python:
self.add_message("raw-checker-failed", args=ast_node.name)
else:
# assert astroid.file.endswith('.py')
# invoke ITokenChecker interface on self to fetch module/block
# level options
self.process_tokens(tokens)
if self._ignore_file:
return False
# walk ast to collect line numbers
self.file_state.collect_block_lines(self.msgs_store, ast_node)
# run raw and tokens checkers
for checker in rawcheckers:
checker.process_module(ast_node)
for checker in tokencheckers:
checker.process_tokens(tokens)
# generate events to astroid checkers
walker.walk(ast_node)
return True
|
initialize counters
|
def open(self):
"""initialize counters"""
self.stats = {"by_module": {}, "by_msg": {}}
MANAGER.always_load_extensions = self.config.unsafe_load_any_extension
MANAGER.max_inferable_values = self.config.limit_inference_results
MANAGER.extension_package_whitelist.update(self.config.extension_pkg_whitelist)
for msg_cat in MSG_TYPES.values():
self.stats[msg_cat] = 0
|
close the whole package/ module it s time to make reports !
|
def generate_reports(self):
"""close the whole package /module, it's time to make reports !
if persistent run, pickle results for later comparison
"""
# Display whatever messages are left on the reporter.
self.reporter.display_messages(report_nodes.Section())
if self.file_state.base_name is not None:
# load previous results if any
previous_stats = config.load_results(self.file_state.base_name)
# XXX code below needs refactoring to be more reporter agnostic
self.reporter.on_close(self.stats, previous_stats)
if self.config.reports:
sect = self.make_reports(self.stats, previous_stats)
else:
sect = report_nodes.Section()
if self.config.reports:
self.reporter.display_reports(sect)
self._report_evaluation()
# save results if persistent run
if self.config.persistent:
config.save_results(self.stats, self.file_state.base_name)
else:
self.reporter.on_close(self.stats, {})
|
make the global evaluation report
|
def _report_evaluation(self):
"""make the global evaluation report"""
# check with at least check 1 statements (usually 0 when there is a
# syntax error preventing pylint from further processing)
previous_stats = config.load_results(self.file_state.base_name)
if self.stats["statement"] == 0:
return
# get a global note for the code
evaluation = self.config.evaluation
try:
note = eval(evaluation, {}, self.stats) # pylint: disable=eval-used
except Exception as ex:
msg = "An exception occurred while rating: %s" % ex
else:
self.stats["global_note"] = note
msg = "Your code has been rated at %.2f/10" % note
pnote = previous_stats.get("global_note")
if pnote is not None:
msg += " (previous run: %.2f/10, %+.2f)" % (pnote, note - pnote)
if self.config.score:
sect = report_nodes.EvaluationSection(msg)
self.reporter.display_reports(sect)
|
callback for option preprocessing ( i. e. before option parsing )
|
def cb_add_plugins(self, name, value):
"""callback for option preprocessing (i.e. before option parsing)"""
self._plugins.extend(utils._splitstrip(value))
|
optik callback for sample config file generation
|
def cb_generate_config(self, *args, **kwargs):
"""optik callback for sample config file generation"""
self.linter.generate_config(skipsections=("COMMANDS",))
sys.exit(0)
|
optik callback for sample config file generation
|
def cb_generate_manpage(self, *args, **kwargs):
"""optik callback for sample config file generation"""
from pylint import __pkginfo__
self.linter.generate_manpage(__pkginfo__)
sys.exit(0)
|
optik callback for printing some help about a particular message
|
def cb_help_message(self, option, optname, value, parser):
"""optik callback for printing some help about a particular message"""
self.linter.msgs_store.help_message(utils._splitstrip(value))
sys.exit(0)
|
optik callback for printing full documentation
|
def cb_full_documentation(self, option, optname, value, parser):
"""optik callback for printing full documentation"""
self.linter.print_full_documentation()
sys.exit(0)
|
optik callback for printing available messages
|
def cb_list_messages(self, option, optname, value, parser): # FIXME
"""optik callback for printing available messages"""
self.linter.msgs_store.list_messages()
sys.exit(0)
|
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