In this tutorial we will discuss about the callable() function in python programming language with the help of examples.
Python callable() function
The term callable means that a object that can be called. The built-in python function is used to check whether the object is callable or not. It returns if the object is callable. It returns if the object is not callable.
Syntax
callable(object)
Parameters of callable() function in python
The function in python takes only single parameter or argument i.e., object
Return value of Python callable() function
The python callable() function is used to return following values;
• It returns if the object is .
• It returns if the object is .
Note: Even if the object is callable, sometimes calls to that object fails.
Example 1: How Python callable() Function works?
a = 7print(callable(a))
def foo():
print("Example")
b = foo
print(callable(b))
Output
False
True
In the above example, A object is not callable but B object seems to be callable (can also be not callable).
Example 2: Callable Object
class foo:def __call__(self):
print('Python is Programming Language')
# Suggest that the foo class is callable
print(callable(foo))
# This means the class is callable
pythonlang = foo()
pythonlang()
Output
True
Python is Programming Language
Example 3: When Object is NOT Callable
class Foo:def program(self):
print('Python is Programming Language')
print(callable(Foo))
Output
True
Here, the instance of Foo class is not callable but it seems like callable. Therefore, an error will appear.
class Foo:def program(self):
print('Python is Programming Language')
print(callable(Foo))
pythonLang = Foo()
pythonLang()
Output
TrueTraceback (most recent call last):
File "<string>", line 8, in <module>
TypeError: 'Foo' object is not callable