30 lines
1.0 KiB
Python
30 lines
1.0 KiB
Python
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if __name__ == '__main__':
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# 如果想要同时迭代多个序列，那么可以使用zip函数
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list1 = [1, 2, 3, 4, 5]
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list2 = ['a', 'b', 'c', 'd', 'e']
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for i, j in zip(list1, list2):
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print(i, j)
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# zip遵循最短木板原则，迭代长度等于最短的可迭代对象长度，如果想要打破这种限制，请使用itertools.zip_longest()
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from itertools import zip_longest
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short_list = [1, 2, 3]
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# fillvalue字段用来填充短列表的缺失值，默认为None
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for i, j in zip_longest(short_list, list1, fillvalue=0):
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print(i, j)
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# zip函数会构建一个元组，它的长度与输入的可迭代对象数量有关
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for i in zip(short_list, list2, list1):
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print(i)
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# 双对象元组可以直接视作键值对转成字典
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dic = dict(zip(list1, list2))
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print(dic)
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# 重点！！！zip函数返回的是一个一次性迭代器，如果需要长久保存，请转成列表在内存里持久化
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storage_list = list(zip(list1, list2))
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