list comprehension question
Kirill Simonov
kirill_simonov at mail.ru
Wed Mar 27 08:19:23 EST 2002
* Tim Peters <tim.one at comcast.net>:
> [Tripp Scott]
> > thanks for the tip. actually, the essence of what i wanted to
> > ask was: "can that SOMETHING be a list of more than one elements
> > which will be _flatly_ added to the result list."
>
> No. len([f(x) for x in y]) == len(y) whenever no exception occurs,
> regardless of the form of f() or type of y.
How about such f(x)?
def f(x):
import sys
sys._getframe(1).f_locals['_[1]'](-x)
return x
def test(f, y):
print 'len([f(x) for x in y]) = %s,' % len([f(x) for x in y]),
print 'but len(y) = %s' % len(y)
test(f, range(10))
--
xi
More information about the Python-list
mailing list