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diy1.py

@@ -15,3 +15,7 @@ dict_hero= {'赵一':30,'丁二':37,'孙五':52,'王猛':89,'周亮':98}
 print(dict_hero)
 dict_hero['王五']=60
 print(dict_hero)
+if '赵一' in dict_hero:
+    print("Y")
+else:
+    print("N")
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