清单理解条件中的`elif` [英] `elif` in list comprehension conditionals

问题描述

我们可以在列表理解中使用elif吗?

Can we use elif in list comprehension?

示例:

l = [1, 2, 3, 4, 5]

for values in l:
    if values==1:
        print 'yes'
    elif values==2:
        print 'no'
    else:
        print 'idle'

我们可以像上面的代码一样将elif包括在列表推导中吗?

Can we include the elif in our list comprehension, in a similar fashion to the code above?

例如，答案如下:

['yes', 'no', 'idle', 'idle', 'idle']

到目前为止，我只在列表理解中使用了if和else.

Up until now, I have only used if and else in list comprehension.

推荐答案

Python的条件表达式正是针对这种用例而设计的:

Python's conditional expressions were designed exactly for this sort of use-case:

>>> l = [1, 2, 3, 4, 5]
>>> ['yes' if v == 1 else 'no' if v == 2 else 'idle' for v in l]
['yes', 'no', 'idle', 'idle', 'idle']

希望这会有所帮助:-)

Hope this helps :-)

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