callable()

Introspection

Returns True if the object appears callable (has a __call__ method).

Signature

callable(object)

Returns

bool

Example

print(callable(print))   # True
print(callable(42))      # False
print(callable(len))     # True

About callable()

callable is a Python introspection function with the signature callable(object). Returns True if the object appears callable (has a __call__ method). It returns a value of type bool.

Python provides a rich set of built-in functions and standard library modules that cover common programming tasks. Understanding these functions helps you write more idiomatic, efficient Python code. The callablefunction is commonly used in data processing, web development, scripting, and automation tasks.

When working with callable(), consider edge cases like empty inputs, None values, and type mismatches. Python's duck typing means many built-in functions work with any object that implements the required protocol (e.g., __len__ for len(), __iter__ for iteration). This flexibility is a key strength of Python's design philosophy.

Related Functions

type()hasattr()isinstance()getattr()