What is a “callable”?

Question

Now that it\'s clear what a metaclass is, there is an associated concept that I use all the time without knowing what it really means.

I suppose everybody made once

Answer 1

Quite simply, a "callable" is something that can be called like a method. The built in function "callable()" will tell you whether something appears to be callable, as will checking for a call property. Functions are callable as are classes, class instances can be callable. See more about this here and here.