filter() + simple program not outputting
Fredrik Lundh
fredrik at pythonware.com
Mon Jul 26 17:27:22 EDT 1999
(posted and mailed)
Joyce Stack <joyce at netcard.com> wrote:
> New to python but not to programming...can someone tell me why this
> simple program is not outputting when i run from the BASH prompt....any
> pointers would be helpful...thanking you in advance....
>
> Joyce
>
> #!/usr/bin/env python
>
> def f(x):
> return x%2 != 0 and x%3 != 0
> filter(f, range(2, 25))
> f( )
dunno. what is it supposed to do? there's
no print statement in there, nor anything
else related to printing. and while "f" is
declared, it's never called. and that
function looks a bit strange -- it starts
out by returning to the caller, and thus
never runs any code.
but it's close. could the following be
what you tried to do:
--- cut ---
#!/usr/bin/env python
def f(x):
return x%2 != 0 and x%3 != 0
print filter(f, range(2, 25))
--- cut ---
note the use of indentation -- things at
the left margin are executed when you
run this as a script ("def" is a statement
too!).
</F>
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