python：將兩個1D列表合並為一個1D列表

Question

我想合並兩個列表的真實含義：

>>> l1 = [1,2,3,4]
>>> l2 = [9,8,7,6]
>>> merged(l1, l2)
[1,9,2,8,3,7,4,6]

我可以輕松地：

>>> m = []
>>> for i1,i2 in zip(l1,l2):
      m.extend([i1,i2])
>>> m
[1,9,2,8,3,7,4,6]

但我想知道是否還有更優雅的東西？

ps：有成千上萬的問題聲稱要合並列表，但是我發現並沒有做到這一點-如果我迷失了真實的問題，我深表歉意！

Answer 1

[item for items in zip(l1, l2) for item in items]
# [1,9,2,8,3,7,4,6]

或者您可以像這樣使用itertools.chain

from itertools import chain
list(chain.from_iterable(zip(l1, l2)))
# [1,9,2,8,3,7,4,6]

Answer 2

使用zip和列表理解：

>>> l1 = [1,2,3,4]
>>> l2 = [9,8,7,6]
>>> [x for xs in zip(l1, l2) for x in xs]
[1, 9, 2, 8, 3, 7, 4, 6]

Answer 3

這個怎么樣：

>>> l1 = [1,2,3,4]
>>> l2 = [9,8,7,6]
>>> sum(zip(l1,l2),())
(1, 9, 2, 8, 3, 7, 4, 6)
>>>