Example of a password strength checker implemented in Python

# coding: utf-8
"""
check
Check if your password safe
"""
import re
# Features
NUMBER = (r'[0-9]')
LOWER_CASE = (r'[a-z]')
UPPER_CASE = (r'[A-Z]')
OTHERS = (r'[^0-9A-Za-z]')
def load_common_password():
 words = []
 with open("10k_most_common.txt", "r") as f:
  for word in f:
   (())
 return words
COMMON_WORDS = load_common_password()
# Classes for managing password strength
class Strength(object):
 """
 Three attributes of password strength: validity, strength, message
 """
 def __init__(self, valid, strength, message):
   = valid
   = strength
   = message
 def __repr__(self):
  return 
 def __str__(self):
  return 
 def __bool__(self):
  return 
class Password(object):
 TERRIBLE = 0
 SIMPLE = 1
 MEDIUM = 2
 STRONG = 3
 @staticmethod
 def is_regular(input):
  regular = ''.join(['qwertyuiop', 'asdfghjkl', 'zxcvbnm'])
  return input in regular or input[::-1] in regular
 @staticmethod
 def is_by_step(input):
  delta = ord(input[1]) - ord(input[0])
  for i in range(2, len(input)):
   if ord(input[i]) - ord(input[i - 1]) != delta:
    return False
  return True
 @staticmethod
 def is_common(input):
  return input in COMMON_WORDS
 def __call__(self, input, min_length=6, min_type=3, level=STRONG):
  if len(input) < min_length:
   return Strength(False, "terrible", "The password is too short.")
  if self.is_regular(input) or self.is_by_step(input):
   return Strength(False, "simple", "Passwords have rules.")
  if self.is_common(input):
   return Strength(False, "simple", "Passwords are common.")
  types = 0
  if (input):
   types += 1
  if LOWER_CASE.search(input):
   types += 1
  if UPPER_CASE.search(input):
   types += 1
  if (input):
   types += 1
  if types < 2:
   return Strength(level <= , "simple", "The password is too simple.")
  if types < min_type:
   return Strength(level <= , "medium", "The code isn't strong enough.")
  return Strength(True, "strong", "The code is strong.")
class Email(object):
 def __init__(self, email):
   = email
 def is_valid_email(self):
  if ("^.+@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$", ):
   return True
  return False
 def get_email_type(self):
  types = ['qq', '163', 'gmail', '126', 'sina']
  email_type = ('@\w+', ).group()[1:]
  if email_type in types:
   return email_type
  return 'wrong email'
password = Password()

# coding: utf-8
"""
test for check
"""
import unittest
import check
class TestCheck():
 def test_regular(self):
  rv = ("qwerty")
  (repr(rv) == "simple")
  ('Rules' in )
 def test_by_step(self):
  rv = ("abcdefg")
  (repr(rv) == "simple")
  ('Rules' in )
 def test_common(self):
  rv = ("password")
  (repr(rv) == "simple")
  ('Common' in )
 def test_medium(self):
  rv = ("ahj01a")
  (repr(rv) == 'medium')
  ('Not strong enough' in )
 def test_strong(self):
  rv = ("asjka9AD")
  (repr(rv) == 'strong')
  ('Very strong' in )
 # Test Mailbox
 def test_email(self):
  rv = ("123@")
  (rv.is_valid_email(), True)
 def test_email_type(self):
  rv = ("123@")
  types = ['qq', '163', 'gmail', '126', 'sina']
  (rv.get_email_type(), types)
if __name__ == '__main__':
 ()