[Tutor] "if clause" in list comprehensions.
alan.gauld at btinternet.com
Wed Oct 21 11:57:23 CEST 2009
> Is the if-else (esp. 'else') in a list comprehension specific for Python 3.x? Or
> did I miss something?
Its not part of list comprehensions per se, you can use it in any *expression*.
It was introduced in Python 2.5 as a response to C's ternary operator:
x = foo?bar:baz
x = bar if foo else baz
So in the list comprehension case we are simply using that standard
expression syntax as the value part of the LC.
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