python - Repeating elements in list comprehension

Question

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

I have this list comprehension:

[[x,x] for x in range(3)]

which results in this list:

[[0, 0], [1, 1], [2, 2]]

but what I want is this list:

[0, 0, 1, 1, 2, 2]

What's the easiest to way to generate this list?

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1 Answer

深蓝 · Answer 1 · 2021-10-23T18:20:43+0000

answered Oct 24, 2021 by 深蓝 (71.8m points)

[y for x in range(3) for y in [x, x]]

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