input: Write a function to generate a random password consisting of 8 characters (numbers, letters, and special characters).
  
  import random
  import string
  
  def generate_password():
      password_characters = string.ascii_letters + string.digits + string.punctuation
      password = ''.join(random.choice(password_characters) for i in range(8))
      return password
  
  assert len(generate_password()) == 8
  assert any(char.isdigit() for char in generate_password()) == True
  assert any(char.isalpha() for char in generate_password()) == True
  assert any(char in string.punctuation for char in generate_password()) == True
output: import random
  import string
  
  def generate_password():
      password_characters = string.ascii_letters + string.digits + string.punctuation
      password = ''.join(random.choice(password_characters) for i in range(8))
      return password