input: import string
  import random
  
  def generate_password():
      """ Generate a random password consisting of 8 characters, including both letters (both
      uppercase and lowercase) and digits.
      >>> print(generate_password())
      'A1b2C3d4'
      """
      chars = string.ascii_letters + string.digits
      return ''.join(random.choice(chars) for _ in range(8))
output:     chars = string.ascii_letters + string.digits
      return ''.join(random.choice(chars) for _ in range(8))