python中如何遍历字典

1. 遍历字典的键key

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①

>>>d={'list':[1,2,3],1:123,'111':'python3','tuple':(4,5,6)}
>>>forkeyind:
print(str(key)+':'+str(d[key]))
list:[1,2,3]
1:123
111:python3
tuple:(4,5,6)

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②

>>>d={'list':[1,2,3],1:123,'111':'python3','tuple':(4,5,6)}
>>>forkeyind.keys():
print(key)
1
list
111
tuple

2. 遍历字典的值value

>>>d={'list':[1,2,3],1:123,'111':'python3','tuple':(4,5,6)}
>>>forvalueind.values():
print(value)
[1,2,3]
123
python3
(4,5,6)

3. 遍历字典的项

>>>d={'list':[1,2,3],1:123,'111':'python3','tuple':(4,5,6)}
>>>foritemind.items():
print(item)
('list',[1,2,3])
(1,123)
('111','python3')
('tuple',(4,5,6))

4. 遍历字典的key-value

①

>>>d={'list':[1,2,3],1:123,'111':'python3','tuple':(4,5,6)}
>>>forkey,valueind.items():
print(key,value)
list[1,2,3]
1123
111python3
tuple(4,5,6)

②

>>>d={'list':[1,2,3],1:123,'111':'python3','tuple':(4,5,6)}
>>>for(key,value)ind.items():
print(key,value)
list[1,2,3]
1123
111python3
tuple(4,5,6)