Newbie Question regarding __init__()

Simon dciphercomputing at gmail.com
Tue Aug 4 22:05:10 CEST 2009


On Aug 3, 11:00 pm, Dave Angel <da... at ieee.org> wrote:
> Simon wrote:
> > On Aug 2, 5:51 am, Dave Angel <da... at ieee.org> wrote:
>
> >> <snip>
> >> I don't understand your comparison to Foxpro.  read on.
>
> >> As your code was last posted, you don't need a return value from
> >> init_Exec()  Every function that doesn't have an explicit return will
> >> return None.  And None is interpreted as False in an "and" expression.  
> >> If you had an "if" around the whole thing, then you'd care.
>
> >> DaveA
>
> > All I meant by the FoxPro comment was the idea of using the equal sign
> > without a variable to throw away the result.  Also in FoxPro there is
> > no such thing as automatically returning None.  If there is no
> > explicit return then True is returned.
>
> > Thanks I did not know that None is interpreted as False.
>
> > Simon
>
> To throw away the result of an expression in Python is even easier.  
> Just don't use it.
>        func1() and func2()
> is a valid expression whose result is not used.  And func2()'s result is
> therefore irrelevant.  But shortcircuiting means that func2() is only
> called if func1() returned False (or something equivalent to it, like 0
> or an empty list)

Thanks for telling me how Python throws away the result.  Secondly my
code works perfectly now that I am properly defining my methods using
"self".



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