chap_7.py

import re

# Strong Password Detection
def is_strong_password(src):
  return all(re.compile(e).search(src) for e in [
    r'.{8}', 
    r'[a-z]', 
    r'[A-Z]', 
    r'[0-9]'
  ])

# Regex Version of strip()
def my_strip(src):
  return re.compile(r'^\s*(.*?)\s*$').sub(r'\1', src)