Validating and Parsing Email Addresses in Python | HackerRank Solution

Hello coders, today we are going to solve Validating and Parsing Email Addresses HackerRank Solution in Python.

Task

A valid email address meets the following criteria:

• It’s composed of a username, domain name, and extension assembled in this format: [email protected]
• The username starts with an English alphabetical character, and any subsequent characters consist of one or more of the following: alphanumeric characters, -,., and _.
• The domain and extension contain only English alphabetical characters.
• The extension is 1, 2, or 3 characters in length.

Given n pairs of names and email addresses as input, print each name and email address pair having a valid email address on a new line.

Hint: Try using Email.utils() to complete this challenge. For example, this code:

import email.utils
print email.utils.parseaddr('DOSHI <[email protected]>')
print email.utils.formataddr(('DOSHI', '[email protected]'))

produces this output:

('DOSHI', '[email protected]')
DOSHI <[email protected]>

Input Format

The first line contains a single integer, n, denoting the number of email address.
Each line i of the n subsequent lines contains a name and an email address as two space-separated values following this format:

name <[email protected]>

Constraints

• 0 < n < 100

Output Format

Print the space-separated name and email address pairs containing valid email addresses only. Each pair must be printed on a new line in the following format:

name <[email protected]>

You must print each valid email address in the same order as it was received as input.

Sample Input

2  
DEXTER <[email protected]>
VIRUS <virus!@variable.:p>

Sample Output

DEXTER <[email protected]>

Explanation

[email protected] is a valid email address, so we print the name and email address pair received as input on a new line.
virus!@variable.:p is not a valid email address because the username contains an exclamation point (!) and the extension contains a colon (:). As this email is not valid, we print nothing.

Solution – Validating and Parsing Email Addresses in Python

# Enter your code here. Read input from STDIN. Print output to STDOUT

import re

pattern = r'^<[A-Za-z](\w|-|\.|_)+@[A-Za-z]+\.[A-Za-z]{1,3}>$'
for _ in range(int(input())):
    name, email = input().split(' ')
    if re.match(pattern, email):
        print(name, email)

Disclaimer: The above Problem (Validating and Parsing Email Addresses) is generated by Hacker Rank but the Solution is Provided by CodingBroz. This tutorial is only for Educational and Learning Purpose.