input: def generate_password():
      """Generate a random password of length 8 characters, containing at least one 
      lowercase letter, one uppercase letter, and one number.
      >>> generate_password()
      'A1b2C3d4'
      >>> generate_password()
      'Z9X8y7W6'
      """
      from random import choice
      import string
      
      chars = string.ascii_uppercase + string.ascii_lowercase + string.digits
      password = ''.join(choice(chars) for i in range(8))
      if any(c.islower() for c in password) and any(c.isupper() for c in password) and any(c.isdigit() for c in password):
          return password
      else: 
          return generate_password()
output:     from random import choice
      import string
      
      chars = string.ascii_uppercase + string.ascii_lowercase + string.digits
      password = ''.join(choice(chars) for i in range(8))
      if any(c.islower() for c in password) and any(c.isupper() for c in password) and any(c.isdigit() for c in password):
          return password
      else: 
          return generate_password()