save project

diy1.py

@@ -3,3 +3,9 @@ print(dict1["name"])
 print(dict1["age"])
 dict1["age"] = 20
 print(dict1)
+dict1['addres'] = "上海"
+print(dict1)
+if "age" in dict1:
+    print("存在")
+else:
+    print("不存在")
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