save project

diy1.py

 dict_hero = {"张三":37,"李四":89,"王五":99}
 print(dict_hero["张三"])
-dict_hero["王五"] = 90
-print(dict_hero)
\ No newline at end of file
+dict_hero["王五"]
+print()
+if"张三"in dict_hero:
+    print(dict_hero["张三"])
\ No newline at end of file