Usefulness of the "not in" operator

[Jon Clements]

On Oct 8, 11:42 am, candide <cand... at free.invalid> wrote:
> Python provides
>
>      -- the not operator, meaning logical negation
>      -- the in operator, meaning membership
>
> On the other hand, Python provides the not in operator meaning
> non-membership. However, it seems we can reformulate any "not in"
> expression using only "not" and "in" operation. For instance
>
>  >>> 'th' not in "python"
> False
>
>  >>> not ('th' in "python")
> False
>  >>>
>
> So what is the usefulness of the "not in" operator ? Recall what Zen of
> Python tells
>
> There should be one-- and preferably only one --obvious way to do it.

You would seriously prefer the later?

Guess I'll have to start writing stuff like:

10 - 5 as 10 + -5 (as obviously the - is redundant as an operation),
and 10 / 2 as int(10 * .5) or something, who needs a divide!?

Jokely yours,

Jon.