Python callable()

Syntax of Python callable() Function

The syntax of Python callable() function is :

Syntax:

Parameters of Python callable() Function

The callable() function takes an object as a parameter, which can be a class, module, or another object.

The object passed as a parameter can be a callable or non-callable object.

Return Value of Python callable() Function

The return value of the Python callable() function is :

• True: If the object is callable
• False: If the object is not callable

Python callable() Function Examples

Some Examples of Python callable() functions are :

Example 1: When an object is callable

Output:

In the above program, the __call__ method enables Python programmers to write classes where the instances behave like functions and can be called like a function.

The instance of the Demo class is callable, so the callable() function returns True when Class Demo is passed to it.

Code:

Output:

Example 2: When Object is not Callable but appears to be Callable

Output:

In the above program, we are not using any in-build Python function like __call__. So even if the callable() function returns True for the Demo class the instance of the Demo class is not callable.

We can see the error returned when the instance of the Demo class is created and called.

Code:

Output:

Example 3: When Object is not Callable

Code:

Output:

In the above program, the integer and string objects are not callable. Therefore, the callable() function returns False for them.

Related Functions in Python

You can read more about other Python functions from here