Writing a string.ishex function

[Wolfram Hinderer]

On 14 Jan., 19:48, MRAB <pyt... at mrabarnett.plus.com> wrote:
> Arnaud Delobelle wrote:
> > "D'Arcy J.M. Cain" <da... at druid.net> writes:
>
> >> On Thu, 14 Jan 2010 09:07:47 -0800
> >> Chris Rebert <c... at rebertia.com> wrote:
> >>> Even more succinctly:
>
> >>> def ishex(s):
> >>>     return all(c in string.hexdigits for c in s)
> >> I'll see your two-liner and raise you.  :-)
>
> >> ishex = lambda s: all(c in string.hexdigits for c in s)
>
> > I'see your one-liner and raise you by four characters :o)
>
> > ishex1 = lambda s: all(c in string.hexdigits for c in s) # Yours
> > ishex2 = lambda s: not(set(s)-set(string.hexdigits))     # Mine
>
> I raise you one character:
>
> ishex2 = lambda s: not(set(s)-set(string.hexdigits))     # Yours
> ishex3 = lambda s: not set(s)-set(string.hexdigits)      # Mine
>
> I could actually go three better:
>
> ishex3=lambda s:not set(s)-set(string.hexdigits)
>
> :-)
>

ishex4=lambda s:not s.strip(string.hexdigits)