save project

diy.py

 # 直接运行以下代码，说说你的发现：
 dict_hero = {'赵一':30,'丁二':37,'孙五':52,'王猛':89,'周亮':98}
-dict_hero["周亮"]=100
-print(dict_hero)
\ No newline at end of file
+dict_hero["kk"]=100
+print(dict_hero)
+if "kk" in dict_hero:
+    print("kk在的")
\ No newline at end of file