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

Question

I've found this question and one thing in the original code bugs me:

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

What's the point of doing this: [y for y in x.split('_')]? split already returns a list and items aren't manipulated in this list comprehension. Am I missing something?

Unless you like typing and pointless overhead there is no point — Padraic Cunningham, Jul 08 '15 at 20:29
@Padraic I used to love typing and pointless overhead, but then I stopped using Java. :) — TigerhawkT3, Jul 08 '15 at 20:32
Some people are so enamored with ```xxx``` comprehensions that they will use them whenever they can. — wwii, Jul 08 '15 at 20:36

score 8 · Answer 1 · answered Jul 08 '15 at 20:29

8

You're correct; there's no point in doing that. However, it's often seen in combination with some kind of filter or other structure, such as [y for y in x.split('_') if y.isalpha()].

answered Jul 08 '15 at 20:29

TigerhawkT3

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score 2 · Answer 2 · answered Jul 08 '15 at 20:29

2

There is no difference in result but using list comprehension in this case in not a good way and in redundant!

>>> x="Alpha_beta_Gamma"
>>> [y for y in x.split('_')]
['Alpha', 'beta', 'Gamma']
>>> x.split('_')
['Alpha', 'beta', 'Gamma']

answered Jul 08 '15 at 20:29

Mazdak

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

2 Answers2