Python `type(x)==` what?

Question

In a code, I am trying to check the type of a class of a variable entered into a function. What I want is something like this:

def foo(x):
    if type(x)=='int':
       pass

But I can't find anything that I can put in place of 'int' that will return True when I input an integer. I have made a temporary fix by doing type(x)==type(1), but I would like to know what to do to not use this sneaky trick.

Answer 1

Use int and isinstance():

if isinstance(x, int):

You could restrict yourself to just the type with:

if type(x) is int:

but that excludes subclasses of int.

However, ask yourself why you are testing for specific types; better to duck-type, and ask for forgiveness.