當一個dict，我們想取出他的key,value資料項，可以使用下列方法進行迭代走訪dict.items()

#dict.py
dict_1 = dict({"a":1111,"b":2222,"c":3333})
for i in dict_1.items():
    print(i[0],i[1])






#dict.py
dict_1 = dict({"a":1111,"b":2222,"c":3333})
for k,v in dict_1.items():
    print(k,v)

若只迭代dict的value，可使用dict.values()

#dict.py
dict_1 = dict({"a":1111,"b":2222,"c":3333})
for v in dict_1.values():
    print(v)

若要迭代dict的key，可使用dict.keys()或者直接迭代dict

#dict.py
dict_1 = dict({"a":1111,"b":2222,"c":3333})
for k in dict_1:
    print(k)
for k in dict_1.keys():
    print(k)

dict.items()、dict.keys()、dict.values()會傳回dictionary view，dictionary view是一個可迭代的物件