input: Write a function to implement a chatbot in Python that can provide customer support in a restaurant. The chatbot reads a user's question from a file named 'random_user_question.txt', and it provides a random response from a predefined list of possible answers.
  assert restaurant_chatbot("random_user_question.txt")=="We serve a variety of dishes - from salads to pizzas to steaks!"
  assert restaurant_chatbot("random_user_question.txt")=="Check out our menu for a full list of options"
  assert restaurant_chatbot("random_user_question.txt")=="We serve a variety of dishes, including traditional Italian, Mexican, and American fare. What would you like to try?"
  assert restaurant_chatbot("random_user_question.txt")=="We have a great selection of meals! What kind of dish are you looking for?"
  assert restaurant_chatbot("random_user_question.txt")=="We have a unique selection of meals - have you checked out our menu?"
output: import random
  
  def restaurant_chatbot(filename):
      responses = [
          "We serve a variety of dishes - from salads to pizzas to steaks!",
          "Check out our menu for a full list of options",
          "We serve a variety of dishes, including traditional Italian, Mexican, and American fare. What would you like to try?",
          "We have a great selection of meals! What kind of dish are you looking for?",
          "We have a unique selection of meals - have you checked out our menu?"
      ]
      with open(filename, 'r') as file:
          question = file.read().strip()
      return random.choice(responses)