yet another list comprehension question
mabdelkader at gmail.com
Sun May 3 09:07:41 CEST 2009
This isn't list comprehension, but it's something to keep in mind:
b = filter(lambda x: None not in x, input_list)
On Sat, May 2, 2009 at 10:25 PM, CTO <debatem1 at gmail.com> wrote:
> On May 2, 10:13 pm, Ross <ross.j... at gmail.com> wrote:
> > I'm trying to set up a simple filter using a list comprehension. If I
> > have a list of tuples, a = [(1,2), (3,4), (5,None), (6,7), (8, None)]
> > and I wanted to filter out all tuples containing None, I would like to
> > get the new list b = [(1,2), (3,4),(6,7)].
> try this:
> b = [i for i in a if None not in i]
> > I tried b = [i for i in a if t for t in i is not None] but I get the
> > error that "t is not defined". What am I doing wrong?
> You've got a "for" and an "if" backwards. t isn't defined when the if
> tries to evaluate it.
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