What does “TypeError 'xxx' object is not callable” means?

Question

As a starting developer in Python I\'ve seen this error message many times appearing in my console but I don\'t fully understand what does it means.

Could anyone tel

Answer 1

That error occurs when you try to call, with (), an object that is not callable.

A callable object can be a function or a class (that implements __call__ method). According to Python Docs:

object.__call__(self[, args...]): Called when the instance is “called” as a function

For example:

x = 1
print x()

x is not a callable object, but you are trying to call it as if it were it. This example produces the error:

TypeError: 'int' object is not callable

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For better understaing of what is a callable object read this answer in another SO post.