input: Write a function to generate a random password consisting of 8 characters. The password should include both letters and digits. If no input is required, then simply generate the password.
  def generate_password():
      chars = string.ascii_letters + string.digits
      return ''.join(random.choice(chars) for _ in range(8))
  
  assert len(generate_password()) == 8
  assert any(c.isdigit() for c in generate_password()) == True
  assert any(c.isalpha() for c in generate_password()) == True
output: def generate_password():
      chars = string.ascii_letters + string.digits
      return ''.join(random.choice(chars) for _ in range(8))