Python iter() method

Multimethods in Python

Last Updated : 21 Apr, 2020

Multimethod basically means a function that has multiple versions, distinguished by the type of the arguments. For better understanding consider the below example.

@multimethod
def sum(x: int, y: int):
    return x + y

@multimethod
def sum(x: str, y: str):
    return x+" "+y

The above example is similar to

def sum(x, y):
    
    if isinstance(x, int) and isinstance(y, int):
        return x + y
    
    elif isinstance(x, str) and isinstance(y, str):
        return x + ' ' + y

Installation

At syntactical level, Python does not support multiple dispatch but it is possible to add multiple dispatch using a library extension multimethod. To install this library type the below command in the terminal.

pip install multimethod

Example 1:

Python3

# Python program to demonstrate
# multimethods


from multimethod import multimethod


# Function that will be called
# for integer addition
@multimethod
def sum(x: int, y: int):
    return x + y

# Function that will be called
# for string addition
@multimethod
def sum(x: str, y: str):
    return x+" "+y

# Driver's code
print(sum(2, 3))
print(sum("Hello", "World"))

Output:

5
Hello World

Example 2:

Python3

# Python program to demonstrate
# multimethods


from multimethod import multimethod


class GFG(object):
    
    @multimethod
    def double(self, x: int):
        print(2 * x)

    @multimethod
    def double(self, x: complex):
        print("sorry, I don't like complex numbers")
        
# Driver Code
obj = GFG()
obj.double(3)
obj.double(6j)

Output:

6
sorry, I don't like complex numbers

Python iter() method

N

nikitadabral30

Improve

Article Tags :

Practice Tags :

python

Similar Reads

Multithreading in Python

This article covers the basics of multithreading in Python programming language. Just like multiprocessing , multithreading is a way of achieving multitasking. In multithreading, the concept of threads is used. Let us first understand the concept of thread in computer architecture. What is a Process

Python List methods

Python list methods are built-in functions that allow us to perform various operations on lists, such as adding, removing, or modifying elements. In this article, weâ€™ll explore all Python list methods with a simple example.List MethodsLet's look at different list methods in Python:append(): Adds an

Python iter() method

Python iter() method is a built-in method that allows to create an iterator from an iterable. An iterator is an object that enables us to traverse through a collection of items one element at a time. Letâ€™s start by understanding how iter() works with a simple example.Pythona = [10, 20, 30, 40] # Con

Python List append() Method

append() method in Python is used to add a single item to the end of list. This method modifies the original list and does not return a new list. Let's look at an example to better understand this.Pythona = [2, 5, 6, 7] # Use append() to add the element 8 to the end of the list a.append(8) print(a)O

Python __add__() magic method

Python __add__() function is one of the magic methods in Python that returns a new object(third) i.e. the addition of the other two objects. It implements the addition operator "+" in Python. Python __add__() Syntax Syntax: obj1.__add__(self, obj2) obj1: First object to add in the second object.obj2

Python | os.cpu_count() method

]os.cpu_count()Â method in Python is used to get the number of CPUs in the system. This method returns None if the number of CPUs in the system is undetermined. In this article, we will see how to get several cores in Python. Python os.cpu_count() Method SyntaxSyntax:Â os.cpu_count() Parameter:Â No par

numpy.multiply() in Python

The numpy.multiply() is a numpy function in Python which is used to find element-wise multiplication of two arrays or scalar (single value). It returns the product of two input array element by element.Syntax:numpy.multiply(arr1, arr2, out=None, where=True, casting='same_kind', order='K', dtype=None

Dunder or magic methods in Python

Python Magic methods are the methods starting and ending with double underscores '__'. They are defined by built-in classes in Python and commonly used for operator overloading.Â They are also called Dunder methods, Dunder here means "Double Under (Underscores)". Python Magic MethodsBuilt in classes

Python Module is a file that contains built-in functions, classes,its and variables. There are many Python modules, each with its specific work.In this article, we will cover all about Python modules, such as How to create our own simple module, Import Python modules, From statements in Python, we c

Multiline String in Python

A sequence of characters is called a string. In Python, a string is a derived immutable data typeâ€”once defined, it cannot be altered. To change the strings, we can utilize Python functions like split, join, and replace.Python has multiple methods for defining strings. Single quotations (''), double