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Higher order functions in Python

In Python, functions are called first-class objects i.e. they can be passed as parameters to other functions or one function can be returned by another function. The functions that use or returns other functions are called Higher-order functions. Consider the following code.


def hello(name):
    print("Hello,",name)

def func(func2):
    print("Calling hello")
    func2("rapid coders")

print("Calling func")

func1(hello)

Output

Calling func1
Calling hello
Hello, rapid coders

Functions can also be assigned to variables. For example -.


def hello():
    print("hello from python")

hello_python=hello
print(hello_python())

Output

hello from python

A function can also return another function.


def hello1():
    print("hello from python")

    def hello2():
        print("hello from rapid coders!")
        
    return hello2()

func=hello1()  
print("Calling func")      
func()

Output

hello from python
Calling func
hello from rapid coders!