Str is a built-in type and cannot be used directly as a variable name

toolbox.py

@@ -84,11 +84,12 @@ def update_ui_lastest_msg(lastmsg, chatbot, history, delay=1):  # 刷新界面
 
 
 def trimmed_format_exc():
-    import os, traceback
-    str = traceback.format_exc()
+    import os
+    import traceback
+    _str = traceback.format_exc()
     current_path = os.getcwd()
     replace_path = "."
-    return str.replace(current_path, replace_path)
+    return _str.replace(current_path, replace_path)
 
 
 def CatchException(f):
@@ -101,7 +102,7 @@ def CatchException(f):
             yield from f(txt, top_p, temperature, chatbot, history, systemPromptTxt, WEB_PORT)
         except Exception as e:
             from check_proxy import check_proxy
-            from toolbox import get_conf
+            # from toolbox import get_conf  # 不需要导入本文件内容
             proxies, = get_conf('proxies')
             tb_str = '```\n' + trimmed_format_exc() + '```'
             if len(chatbot) == 0: