diff --git a/ZH/DevelopGuide/DevSpecification/BackendDevStandards/BestPractices/python/README.md b/ZH/DevelopGuide/DevSpecification/BackendDevStandards/BestPractices/python/README.md
index 199c47b1a..978f59768 100644
--- a/ZH/DevelopGuide/DevSpecification/BackendDevStandards/BestPractices/python/README.md
+++ b/ZH/DevelopGuide/DevSpecification/BackendDevStandards/BestPractices/python/README.md
@@ -86,7 +86,7 @@ if delta_seconds > 11 * 24 * 3600:
 list_two = []
 for v in list_one:
     if v[0]:
-        new_list.append(v[1])
+        list_two.append(v[1])
 
 # GOOD one
 list_two = [v[1] for v in list_one if v[0]]
@@ -620,4 +620,4 @@ if validated_data["data_type"] == "cleaned":
      kafka_config = data_id_info["result_table_list"][0]["shipper_list"][0]
 else:
     kafka_config = data_id_info["mq_config"]  
-```
\ No newline at end of file
+```