input: Write a function to generate a random password of length 8, which consists of alphanumeric characters and at least one special character. If the password does not contain at least one special character, regenerate it. Print the generated password.
  
  import string
  import random
  
  def generate_password():
      chars = string.ascii_letters + string.digits + string.punctuation
      pwd_length = 8
  
      password = ''
      for i in range(pwd_length):
          password += random.choice(chars)
      
      # Check if at least one special character exists in the password
      if any([char in string.punctuation for char in password]):
          return password
      else:
          return generate_password()
  
  print(generate_password())
  
  assert len(generate_password()) == 8
  assert any([char in string.punctuation for char in generate_password()])
  assert all([char in (string.ascii_letters + string.digits + string.punctuation) for char in generate_password()])
output: import string
  import random
  
  def generate_password():
      chars = string.ascii_letters + string.digits + string.punctuation
      pwd_length = 8
  
      password = ''
      for i in range(pwd_length):
          password += random.choice(chars)
      
      if any([char in string.punctuation for char in password]):
          return password
      else:
          return generate_password()