input: Write a function to implement a simple chatbot using Python and state diagrams based on the provided states and transitions. The function should maintain the current state of the conversation, print the appropriate messages, and update the state based on user input. If the user input is not recognized, the chatbot should prompt the user to try again. The chatbot should end when it reaches a terminal state.
  assert chatbot()==None
  assert chatbot(initial_state=state0)==None
  assert chatbot(initial_state=state1, user_input='Career advice')==None
  assert chatbot(initial_state=state2, user_input='Where can I find good tutorials')==None
  assert chatbot(initial_state=state3)==None
  assert chatbot(initial_state=state4)==None
  assert chatbot(initial_state=state5)==None
  assert chatbot(initial_state=state6)==None
output: 
  def chatbot(initial_state=state0, user_input=None):
      current_state = initial_state
      while current_state not in [state3, state4, state5, state6]:
          if current_state == state0:
              print("Welcome! How can I assist you today?")
              user_input = input()
              if user_input == 'Career advice':
                  current_state = state1
              elif user_input == 'Technical help':
                  current_state = state2
              else:
                  print("Sorry, I didn't understand that. Please try again.")
          elif current_state == state1:
              print("Sure, I can help with career advice. What specifically would you like to know?")
              user_input = input()
              if user_input == 'Where can I find good tutorials':
                  current_state = state2
              else:
                  print("Sorry, I didn't understand that. Please try again.")
          elif current_state == state2:
              print("There are many great tutorials available online. Do you have a specific topic in mind?")
              user_input = input()
              if user_input == 'Yes':
                  current_state = state3
              elif user_input == 'No':
                  current_state = state4
              else:
                  print("Sorry, I didn't understand that. Please try again.")
      if current_state == state3:
          print("Great! Let me know what topic you're interested in and I'll point you in the right direction.")
      elif current_state == state4:
          print("No problem. Here are some general resources that might help you.")
      elif current_state == state5:
          print("Thank you for the conversation. Have a great day!")
      elif current_state == state6:
          print("Goodbye! If you have more questions, feel free to ask.")
  