HackerRank Python - Validating Email Addresses With a Filter

You are given an integer N followed by N email addresses. Your task is to print a list containing only valid email addresses in lexicographical order.

  1. def fun(email):

  2.     try:

  3.         username, url = email.split('@')

  4.         website, extension = url.split('.')

  5.     except ValueError:

  6.         return False

  7. 

  8.     if username.replace('-', '').replace('_', '').isalnum() is False:

  9.         return False

  10.     elif website.isalnum() is False:

  11.         return False

  12.     elif len(extension) > 3:

  13.         return False

  14.     else:

  15.         return True

  16. 

  17. 

  18. 

  19. def filter_mail(emails):

  20.     return list(filter(fun, emails))

  21. 

  22. if __name__ == '__main__':

  23.     n = int(input())

  24.     emails = []

  25.     for _ in range(n):

  26.         emails.append(input())

  27. 

  28. filtered_emails = filter_mail(emails)

  29. filtered_emails.sort()

  30. print(filtered_emails)
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