Pivy problem and some other stuff

Zentrader zentraders at gmail.com
Sun Sep 2 16:35:00 CEST 2007


On Aug 30, 8:10 pm, Scott David Daniels <dani... at dsl-only.net> wrote:
> Marc 'BlackJack' Rintsch wrote:
>
> A fine repy
>
> > In [57]: funcs = [a, b]
> > In [58]: funcs
> > Out[58]: [<function a at 0xb7792e2c>, <function b at 0xb779e1ec>]
>
> > In [59]: funcs[0]()
> > Out[59]: 1
>
> > In [60]: funcs[1]()
> > Out[60]: 2
>
> and a "list comprehension" allows you to call these things no matter how
> long the list is.
>
> So after the above:
>      >>> results = [f() for f in funcs]
>      >>> print results
>      [1, 2]

You can also use exec, but someone will tell you that the sky is going
to fall if you do.  I am one of the ones who think that calling a
function with
results = [f() for f in funcs]
doesn't "work" because it gives a meaningless error message that the
calling line didn't work.  There is already enough discussion about
this, so if you use "some_string()" to call a function, wrap it in a
try/except with a traceback.




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