check if v2 to v1 already done

app.py

@@ -20,15 +20,11 @@ def replace_string_in_files(folder_path, old_str, new_str):
                         # Replace the old string with the new string
                         print(line.replace(old_str, new_str), end='')
 
-#with open('change_log.txt','r') as f:
-#    status = f.readlines()
-
-#if status[-1] != 'changed':                      
-#replace_string_in_files(module_file_path, 'from pydantic', 'from pydantic.v1')
-#    with open('change_log.txt','w'):
-#        f.write('changed')
-
+with open(module_file_path+'/schema.py','r') as f:
+    haystack_schema_file = f.read()
 
+if 'from pydantic.v1' not in haystack_schema_file:
+    replace_string_in_files(module_file_path, 'from pydantic', 'from pydantic.v1')
 
 
 from operator import index