updateed app.py, added file to check if v1 is already changed

app.py

@@ -24,7 +24,7 @@
 #    status = f.readlines()
 
 #if status[-1] != 'changed':                      
-#    replace_string_in_files(module_file_path, 'from pydantic', 'from pydantic.v1')
+replace_string_in_files(module_file_path, 'from pydantic', 'from pydantic.v1')
 #    with open('change_log.txt','w'):
 #        f.write('changed')