input: 
  import string
  import random
  
  def generate_password() -> str:
      """Generate a random password consisting of 8 characters.
      >>> generate_password()
      'aB3dFgH7'
      >>> generate_password()
      '1q2w3e4r'
      """
      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))