展平元组列表 [英] Flattening a list of tuples

问题描述

如何将元组列表中的所有元素循环到一个空列表中?

How can I loop through all the elements in a list of tuples, into an empty list?

例如:

tup_Before = [(69592, 69582), (69582, 69518), (69518, 69532), (69532, 69525)]

tup_After = [69592, 69582, 69582, 69518, 69518, 69532, 69532, 69525]

推荐答案

列表理解:

tup_after = [v for t in tup_Before for v in t]

或使用itertools.chain.from_iterable():

from itertools import chain
tup_after = list(chain.from_iterable(tup_Before))

演示:

>>> tup_Before = [(69592, 69582), (69582, 69518), (69518, 69532), (69532, 69525)]
>>> [v for t in tup_Before for v in t]
[69592, 69582, 69582, 69518, 69518, 69532, 69532, 69525]
>>> from itertools import chain
>>> list(chain.from_iterable(tup_Before))
[69592, 69582, 69582, 69518, 69518, 69532, 69532, 69525]

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