Pythonic emptiness checking

r rt8396 at
Wed Apr 29 15:45:17 CEST 2009

On Apr 29, 8:37 am, Filip Gruszczyński <grusz... at> wrote:
> One of the Python Zen rules is Explicit is better implicit. And yet
> it's ok to do:
> if x:
>    do_sth
> when x is string or list. Since it's very comfy, I've got nothing
> against though. I am just curious, why is it so?

It also works for numbers and tuples and... All types have a value in
python try the bool() function

> And one more thing: is it ok to do
> if x:
> instead of
> if x is not None:
> Because I often encounter it and would like to know, if I can simplify
> it. Especially that I liked similar construction in C/C++.

Well you could do either or, but i very much like the simplicity of

if <value>:
    do this

"Python is simplistic programming bliss. don't thank God, thank

More information about the Python-list mailing list