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Showing content from http://mail.python.org/pipermail/python-dev/2005-March/052059.html below:

[Python-Dev] comprehension abbreviation (was: Adding any() and all())

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Barry:

> Ping's suggested list comprehension abbreviation, i.e.:

>    [x in seq if x] == [x for x in seq if x]

> might help.

Note that the last x shouldn't have to be x.

    [x in seq if f(x)] 

is by far my most common syntax error, and 

    [x for x in seq if f(x)]

is always what I want instead.

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