RPG data validation

import json

#-# CODE WILL BE ADDED HERE IN THE NEXT STEP #-#
# Load data from the file
try:
    print("Retrieving player details")
    with open("gamedata.json", "r") as f:
        gamedata = json.load(f)
        name = gamedata["playername"]
        health = gamedata["playerhealth"]
        currentRoom = gamedata["playercurrentRoom"]
        inventory = gamedata["backpack"]
    if health <= 0:
        print('You collapse from exhaustion... GAME OVER!')

    if health > 5:
        for i in range(10):
            print("You have cheated")
        print("you are morally degenerate")

except FileNotFoundError:
    print("No player found, creating a new gamedata file")
    f = open('gamedata.json', 'w')
    f.close()
    name = None
    health = 5
    currentRoom = 'Hall'
    inventory = []


def showInstructions():
    # Print a main menu and the commands
    print('''
RPG Game
========

Get to the Garden with a key and a potion.
Avoid the monsters!

You are getting tired; each time you move you lose 1 health point.

Commands:
  go [direction]
  get [item]
''')

def showStatus():
  # Print the player's current status
  print('---------------------------')
  print(name + ' is in the ' + currentRoom)
  print("Health : " + str(health))
  # Print the current inventory
  print("Inventory : " + str(inventory))
  # Print an item if there is one
  if "item" in rooms[currentRoom]:
    print('You see a ' + rooms[currentRoom]['item'])
  print("---------------------------")

'''following lines are no longer needed:
# Set up the game
name = None
health = 5
currentRoom = 'Hall'
inventory = []
'''

# A dictionary linking a room to other room positions
rooms = {
          'Hall' : { 'south' : 'Kitchen',
                     'east'  : 'Dining Room',
                     'item'  : 'key'
                   },

          'Kitchen' : { 'north' : 'Hall',
                        'item'  : 'monster'
                      },

          'Dining Room' : { 'west'  : 'Hall',
                            'south' : 'Garden',
                            'item'  : 'potion'
                          },

          'Garden' : { 'north' : 'Dining Room' }
        }

# Ask the player their name
if name is None:
    name = input("What is your name, Adventurer? ")
    showInstructions()

# Loop forever
go_count = 0
health_initial = health
while go_count <= health_initial and go_count >= 0 and go_count <= 5 and health >= 0 and health <= 5:
    print("go_count ", go_count, "; health ", health)
    showStatus()

    # Get the player's next 'move'
    # .split() breaks it up into an list array
    # e.g. typing 'go east' would give the list:
    # ['go','east']
    move = ''
    while move == '':
        move = input('>')

    move = move.lower().split()

    # If they type 'go' first
    if move[0] == 'go':
        go_count += 1

    if move[0] == 'go' and (health >= 1 and health <=5):
        health = health - 1
        # Check that they are allowed wherever they want to go
        if move[1] in rooms[currentRoom]:
          # Set the current room to the new room
          currentRoom = rooms[currentRoom][move[1]]
        # or, if there is no door (link) to the new room
        else:
          print('You can\'t go that way!')

    elif move[0] == 'go' and not(health >= 1 and health <=5):
        if health <= 0:
          print('You collapse from exhaustion... GAME OVER!')
          break
        if health > 5:
          for i in range(10):
            print("You have cheated")
          break


    # If they type 'get' first
    if move[0] == 'get' :
        # If the room contains an item, and the item is the one they want to get
        if 'item' in rooms[currentRoom] and move[1] in rooms[currentRoom]['item']:
          # Add the item to their inventory
          inventory += [move[1]]
          # Display a helpful message
          print(move[1] + ' got!')
          # Delete the item from the room
          del rooms[currentRoom]['item']
        # Otherwise, if the item isn't there to get
        else:
          # Tell them they can't get it
          print('Can\'t get ' + move[1] + '!')
    #-# CODE WILL BE ADDED HERE IN THE NEXT STEP #-#
    # Save game data to the file
    gamedata = {
        "playername": name,
        "playerhealth": health,
        "playercurrentRoom": currentRoom,
        "backpack": inventory
    }
    with open("gamedata.json", "w") as f:
        json.dump(gamedata, f)

    # Player loses if they enter a room with a monster
    if 'item' in rooms[currentRoom] and 'monster' in rooms[currentRoom]['item']:
        print('A monster has got you... GAME OVER!')
        break

    # Player wins if they get to the garden with a key and a potion, and 0<=health<=3
    if (health >= 0 and health <=3 ) and (currentRoom == 'Garden' and 'key' in inventory and 'potion' in inventory ) :
        print('You escaped the house... YOU WIN!')
        break