python的字典由兩部分組成. key(鍵),value(值)

創建個字典

dict1 = {"name":"test1","year":"18","sex":"m"}

獲取Key

for key in dict1:print(key)輸出 name year sex

獲取key

for key in dict1:print(key+':'+dict1[key]) 輸出 name:test1 year:18 sex:m

獲取key

for key in dict1.keys():print(key+':'+dict1[key]) 輸出 name:test1 year:18 sex:m

for key in dict 與 for key in dict.keys() 完全等價

遍歷值

for value in dict1.values():print(value) 輸出 test1 18 m

遍歷 key 與 值

dict1 = {"name":"test1","year":"18","sex":"m"} for key,value in dict1.items():print("key:"+key+" "+"value:"+value) 輸出 key:name value:test1 key:year value:18 key:sex value:m

遍歷 key 與 值

for (key,value) in dict1.items():print("key:"+key+" "+"value:"+value) 輸出 key:name value:test1 key:year value:18 key:sex value:m

總結

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