Python中如何动态往列表中添加字典

>>> keys = ['a', 'b', 'c']

>>> values = [1, 2, 3]

>>> dictionary = dict(zip(keys, values))

>>> print(dictionary)

{'a': 1, 'b': 2, 'c': 3}

>>> dict.keys({"a":5,"b":2})

['a', 'b']

>>> {"a":5,"b":2}.keys()

['a', 'b']

dict.keys 是字典类里的一个方法.取出字典里所有的 "键" 并以列表方式返回.

>>>dict_info={}

>>>for item in range(1,101):

... dict_info[item]=1

...

>>>len(dict_info)

100

>>>dict_info.keys()

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,

23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,

43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62,

63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82,

83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100]

>>>

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