Help With filter().

[EricIDLE]

I Still Dont Get It. Could you explain it in simpiler terms?

James Logajan <JamesL at Lugoj.Com> wrote in message
news:3B4CEF3C.D664D82A at Lugoj.Com...
> EricIDLE wrote:
> >
> > What does filter do? I don't understand when I read it other places.
>
>   newlist = filter(somefunc, somelist)
> #### is roughly the same as doing:
>   newlist = []
>   for entry in somelist:
>       if somefunc(entry):
>           newlist.append(entry)
> ####
>
> So the newlist will have only those entries for which somefunc returns a
> true value. Note that if you do:
>   newlist = filter(None, somelist)
> #### this is roughly the same as:
>   newlist = []
>   for entry in somelist:
>       if entry:   # Notice change here.
>           newlist.append(entry)
> ####
>
> Note that if somelist is a string or tuple, then newlist will be a string
or
> tuple.