Bugs fixed

.gitignore

@@ -1 +1,4 @@
-__pycache__
+__pycache__
+
+tmp
+/tmp

backend.py

@@ -6,6 +6,7 @@ from fuzzywuzzy import process
 import gradio as gr
 import pandas as pd
 import os,json
+import time
 
 class Backend:
     def __init__(self):
@@ -266,6 +267,7 @@ class Backend:
             return file_name, question, self.answer, self.highlighted_out, highlighted_out_html, 'Please judge on the generated answer', 'Please judge on the generated answer', 'Still need to click the button above to save the results', None, None
 
     def download_answer(self, path = './tmp', name = 'answer.xlsx'):
+        path = os.path.join(path,str(time.time()))
         os.makedirs(path, exist_ok = True)
         path = os.path.join(path, name)
         # self.ori_answer_df['questions'] = self.questions
@@ -277,6 +279,7 @@ class Backend:
         return path
     
     def download_corrected(self, path = './tmp', name = 'corrected_answer.xlsx'):
+        path = os.path.join(path,str(time.time()))
         os.makedirs(path, exist_ok = True)
         path = os.path.join(path, name)
         # self.answer_df['questions'] = self.questions