[英]How to concatenate multiple lists element wise
Inputs: 输入:
l1 = ['a', '', '', '']
l2 = ['', 'b', '', '']
l3 = ['', '', 'c', '']
l4 = ['', '', '', 'd']
Expected output: 预期产量:
['a', 'b', 'c', 'd']
I tried 我试过了
list(map(str.__add__, l1, l2, l3, l4))
looks like str.__add__
doesn't accept more than two list objects. 看起来像
str.__add__
不接受两个以上的列表对象。
Any workaround ? 任何解决方法?
Edit: Based on Jim Fasarakis-Hilliard comment. 编辑:基于Jim Fasarakis-Hilliard的评论。
l1 = ['a', '1', '', '']
l2 = ['', 'b', '2', '']
l3 = ['', '', 'c', '']
l4 = ['', '', '', 'd']
Expected output: 预期产量:
['a', '1b', '2c', 'd']
Thanks 谢谢
Seems like you need zip
好像你需要
zip
[''.join(x) for x in zip(l1, l2, l3, l4)]
# ['a', 'b', 'c', 'd']
For the updated input: 对于更新的输入:
[''.join(x) for x in zip(l1, l2, l3, l4)]
# ['a', '1b', '2c', 'd']
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