Semantic way to check if variable is None

Question

I have a variable x that I want to cast to int or return None if it is None.

Is there a shorthand way of doing the following:

if x:
    x = int(x)

You mean `x = x and int(x)`? – Martijn Pieters Jun 21 '15 at 09:03 — Martijn Pieters, Jun 21 '15 at 09:03
Thanks Martijn, that's a great solution. – user2066880 Jun 21 '15 at 09:09 — user2066880, Jun 21 '15 at 09:09

Avinash Raj · Accepted Answer · 2015-06-21T09:20:06.420

3

Try this,

x = int(x) if x else None

or

x = int(x) if x is not None else None

edited Jun 21 '15 at 09:20

answered Jun 21 '15 at 09:04

Avinash Raj

1

This doesn't work with 0: you should test "x is not None" – Don Jun 21 '15 at 09:12
1

you mean this `x = int(x) if x is not None else None` – Avinash Raj Jun 21 '15 at 09:19
you mean `int(x) if x else x` or `int(x) if x is not None else None` – stefan Jun 22 '15 at 05:07

1 Answers1