Check if email address valid or not in Python

Python – Extract domain name from Email address

Last Updated : 18 Jan, 2025

Extracting the domain name from an email address involves isolating the part after the @ symbol. For example we are having string email= “[email protected]” so we need to extract the domain name of email address so that the output becomes "example.com". To do this operation we can use methods like spilt(), partition(), Regular expression.

Using `split()`

split() method in Python divides a string into a list of substrings based on a specified delimiter.

Python

email = "[email protected]"

# Splitting the email string at the '@' symbol and accessing the second part (domain)
domain = email.split('@')[1]

print(domain)

Output

example.com

Explanation:

split('@') function splits the string at the @ symbol.
Second part of the split string ([1]) is the domain name

Using Regular Expressions (`re.search`)

re.search() method in Python searches for a pattern within a string and returns the first match found.

Python

import re

# Defining an email string
e = "[email protected]"

# Using the search function to find a match for the domain part of the email
match = re.search(r'@([a-zA-Z0-9.-]+)', e)

# If a match is found, extracting the domain part (the part after '@') using the group() method
if match:
    domain = match.group(1)
   
    print(domain)

Output

example.com

Explanation:

Regular expression @([a-zA-Z0-9.-]+) matches the domain part after the @ symbol.
match.group(1) retrieves the matched domain.

Using `partition()`

partition() method splits the string into three parts: before the '@', the '@' symbol, and after the '@'. domain part is extracted by accessing third element using index.

Python

email = "[email protected]"

# Splitting the email at '@' and selecting the domain part
domain = email.partition('@')[2]
print(domain)

Output

example.com

Explanation:

partition('@') method splits the string into three parts: the part before the @, the @, and the part after.
Domain is the third part, accessed with [2].

Check if email address valid or not in Python

manjeet_04

Improve

Article Tags :

Practice Tags :

python

Similar Reads

Extract feed details from RSS in Python

In the article, we will be seeing how to extract feed and post details using RSS feed for a Hashnode blog. Although we are going to use it for blogs on Hashnode it can be used for other feeds as well. RSS means Rich Site Summary and uses standard web formats to publish information that changes frequ

Python - Extract digits from given string

We need to extract the digit from the given string. For example we are given a string s=""abc123def456gh789" we need to extract all the numbers from the string so the output for the given string will become "123456789" In this article we will show different ways to extract digits from a string in Py

Python program to extract Email-id from URL text file

Prerequisite : Pattern Matching with Python Regex Given the URL text-file, the task is to extract all the email-ids from that text file and print the urllib.request library can be used to handle all the URL related work. Example : Input : Hello This is Geeksforgeeks [email protected] rev

Check if email address valid or not in Python

Given a string, write a Python program to check if the string is a valid email address or not. An email is a string (a subset of ASCII characters) separated into two parts by the @ symbol, a "personal_info" and a domain, that is personal_info@domain. Example: Email Address Validator using re.match()

Python Program to Find and Print Address of Variable

In this article, we are going to see how to find and print the address of the Python variable. It can be done in these ways: Using id() functionUsing addressof() functionUsing hex() functionMethod 1: Find and Print Address of Variable using id()We can get an address using id() function, id() functio

Python - Extract range characters from String

Given a String, extract characters only which lie between given letters. Input : test_str = 'geekforgeeks is best', strt, end = "g", "s" Output : gkorgksiss Explanation : All characters after g and before s are retained. Input : test_str = 'geekforgeeks is best', strt, end = "g", "r" Output : gkorgk

Extract Nested Data From Complex Json

JSON (JavaScript Object Notation) is a widely used data interchange format due to its simplicity and human-readable structure. In many scenarios, JSON data can be complex, containing nested structures and arrays. Extracting specific information from such complex JSON becomes essential for data analy

Python - Extract hashtags from text

A hashtag is a keyword or phrase preceded by the hash symbol (#), written within a post or comment to highlight it and facilitate a search for it. Some examples are: #like, #gfg, #selfie We are provided with a string containing hashtags, we have to extract these hashtags into a list and print them.

Finding IP Address using Python

An IP(Internet Protocol) address is an identifier assigned to each computer and other device(e.g., router, mobile, etc.) connected to a TCP/IP network that is used to locate and identify the node in communication with other nodes on the network. IP addresses are usually written and displayed in huma

Extract Substrings From A List Into A List In Python

Python is renowned for its simplicity and versatility, making it a popular choice for various programming tasks. When working with lists, one common requirement is to extract substrings from the elements of the list and organize them into a new list. In this article, we will see how we can extract s