Terry Reedy wrote:
> To me, that says pretty clearly that start and end have to be
> 'positions', ie, ints or other index types. So I would say that the
> error message is a bug. I see so reason why one would want to use None
> rather that 0 for start or None rather than nothing for end.
If you're trying to wrap a call to startswith in a function that "looks
like" startswith, there's no easy way to pass in the information that your
caller wants the default parameters. The case I ran into was
def wrapped_range (start, stop=None, span=None):
do_some_things()
result = range (start, stop, span) # range doesn't(/didn't) accept this
return result
Tne answer in that case was to take *args as the parameter to wrapped_range
and count arguments to distinguish between the different calls to range.
Mel.
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