On Jan 15, 12:22 am, "D'Arcy J.M. Cain" <da...@druid.net> wrote:
> Just return False once you find a non-hex digit.
>
> def ishex(s):
> for c in s:
> if not c in string.hexdigits: return False
>
> return True
>
> And here are your unit tests. Every line should print "True".
>
> print ishex('123') is True
> print ishex('abc') is True
> print ishex('xyz') is False
> print ishex('0123456789abcdefABCDEF') is True
> print ishex('0123456789abcdefABCDEFG') is False
>
Thanks to Iain and to you.
One further question: even though it is a single function, is there
any way to convert it into a module? Can existing modules be enhanced
with functions such as these? If not, how may I make my own module,
called, say mystring? At present, I am saving the file as ishex.py and
calling it after declaring
from ishex import ishex
Is there a more elegant way to integrate this function and make it
available to other python scripts using the import mechanism?
Thanks.
Chandra
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