Python Functions as Arguments
Overview
Python Functions can be passed as arguments to another function. We can pass functions as arguments to other functions.
Functions as Arguments
The function that takes other functions as arguments is called a higher-order function. Functions like map, filter, and reduce are higher-order functions that accept other functions as arguments. This powerful feature allows you to create more flexible and reusable code.
Example
Let’s understand the concept with the help of an example.
# Python function as arguments
# Python Tutorials – www.TestingDocs.com
def square(x):
return x ** 2
def cube(x):
return x ** 3
# Function that accepts another function as argument
def operate(func, x):
result = func(x)
return result
print(“Square:”,operate(square, 9))
print(“Cube:”,operate(cube,3))
Output
The output of the program is as follows:
Square: 81
Cube: 27
In this example, operate() is a higher-order function that takes a function argument: func a function argument. It then calls the provided function with the given value and returns the result.
For example, operate(square,9) invokes the defined square() function.
This feature is used in functional programming and allows you to write more generic and reusable code by separating concerns and promoting modular design.
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