Python Check if Email is Valid: 3 Easy Ways

Hey guys, in this tutorial I will show you at least 3 ways to validate an email in Python. Validate here means to check if an email is valid or not.

We will be using RegEx and 2 libraries: email_validator and flanker.

Let's go!

Check if Email is Valid using RegEx

Similar to the URLs, emails also have a common pattern that can be expressed using RegEx.

Take a look at those examples:

• dminhvu.work@gmail.com
• dminhvu+abc@gmail.com
• minhvdse000@fpt.edu.vn

The common point is:

• Starts with a string of characters, which is your username.
• Followed by an @ symbol.
• Followed by a domain name, e.g. gmail.com, fpt.edu.vn, etc.

So, we can use the following RegEx to validate an email:

import re

def validate_email(email):
		pattern = r"^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$"
		return re.match(pattern, email)

print(validate_email("dminhvu")) # None
print(validate_email("dminhvu.work@gmail.com")) # <re.Match object; span=(0, 24), match='dminhvu.work@gmail.com'>
print(validate_email("dminhvu+abc@gmail.com")) # <re.Match object; span=(0, 21), match='dminhvu+abc@gmail.com'>
print(validate_email("minhvdse000@fpt.edu.vn")) # <re.Match object; span=(0, 24), match='minhvdse000@fpt.edu.vn'>

You can run it using python3 validate_email.py command.