My process for writing terminal/text/cmd based games.

Currently writing a terminal based game  and  wanted to share the process I use to keep my game design simple. 

The game basically  does three things:

1. Display some information  to the player.
2. The player enters some input.
3.  The input is processed.

And the process  is repeated from step 1 again. Every scene or screen, will more or less have all these things.

The code below is the base class that is inherited by every scene/screen

class GameState:
    def __init__(self,game):
        self.game = game    
     def display(self):         
        return NotImplementedError("Each state must have a display")     
    def handle_input(self,user_input):         
        return NotImplementedError("Each state must have an input") 

So a simple screen for lets say interaction screen would inherit from our base class and would look something like this:

class NPC(GameState):
    def display(self):
        print("You are approached by a sketchy dude in a hoodie. What do you do?")
        print("         1. Run ")
        print("         2. Fight ")
        print("         3. F around and F out ")
    def run(self):
        print("running")
    # you can write any other function you require here
    def handle_input(self,user_input):
        if user_input ==  1:
            self.run() 
        # elif user_input == 2:
            # self.fight()
        # elif user_input == 3:
            # self.fifo()

Now for the main game loop we import our scenes to the main file:

from scenes import NPC
class Game:
    def __init__(self):
        self.interaction = NPC(self)
        self.current_scene = self.interaction
    def change_state(self,new_state) -> None:
        self.current_state = new_state
    def run(self):
        while self.running:
            self.current_state.display() 
                try:
                    user_input = int(input(">"))
                    self.current_state.handle_input(user_input)
                except ValueError:
                    print("Invalid input")
if __name__ == "__main__":
    game = Game()
    game.run()

The  change_state() function helps us change between from one scene to another.

Conclusion: And that's it, every time I want to create a new scene or page I just create a new .py file, import the base game state and start writing a new screen. It keeps my code organized. I have also written Pygame games in this state manager.