python - Difference between [y for y in x.split('_')] and x.split('_') -

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i've found this question , 1 thing in original code bugs me:

>>> x="alpha_beta_gamma" >>> words = [y y in x.split('_')]

what's point of doing this: [y y in x.split('_')]? split returns list , items aren't manipulated in list comprehension. missing something?

you're correct; there's no point in doing that. however, it's seen in combination kind of filter or other structure, such [y y in x.split('_') if y.isalpha()].


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