I cannot find location of some basic class in Python

I have a problem that seems very ungooglable.

There is a compile function in Python.

c = compile('6', 'ff', 'exec')

The result of this is a class named code.

>>> c.__class__
<class 'code'>

I wanted to make a comprison to detect a type, but I can't find a module with this class. Naturally I could code it like this:

if type(unknown_object) == some_codeobj.__class__:

But it's not very elegant. Does anyone knows, where I can find the class?