title: UnboundLocalError: local variable 'money' referenced before assignment
body: <p>I'm trying to get rid of a error in python but so far every method i've tried hasn't worked. Any help would be greatly appreciated.</p>
  
  <p><strong>The code:</strong> </p>
  
  <pre><code>from sense_hat import SenseHat
  import random
  from guizero import App, PushButton,Text
  import time
  import pygame.mixer
  from pygame.mixer import Sound
  pygame.mixer.init()
  sense = SenseHat()
  app = App(title="Fruity Fruit Machine", bgcolor="yellow")
  mario = Sound("SuperMarioBros.ogg")
  money = 30.00
  casino = 100.00
  global money
  global casino
  def machine():
       sense.clear(0,0,0)
       images = ["apple.png", "orange.png", "lemon.png"]
       fruit = []
       money = money - 1.00
       for i in range(3):
            img = random.choice(images)
            fruit.append(img)
            sense.load_image(img)
            time.sleep(3)
            sense.clear(0,0,0)
       if all_same(fruit) == True:
            sense.show_message("You won £20!")
            casino = casino - 20.00
            money = money + 20.00
            display_casino()
            dispaly_money()
            dc = "Casino money: " + casino
            cm.set(dc)
            md = "Your money: " + money
            m.set(md)
       else:
            sense.show_message("You got 30p!")
            money = money + 00.30
            casino = casino + 00.70
            display_casino()
            display_money()
            dc = "Casino money: " + casino
            cm.set(dc)
            md = "Your money: " + money
            m.set(md)
  
  def play_mario():
       mario.play()
  def all_same(items):
       return all(x == items[0] for x in items)
  
  
  button = PushButton(app, command=machine, text="SPIN")
  button2 = PushButton(app, command=play_mario, text="Play Music")
  cm = Text(app, text="",align="left")
  m = Text(app, text="",align="right")
  </code></pre>
  
  <p>The error is: <strong>UnboundLocalError: local variable 'money' referenced before assignment</strong>. Python also sometimes comes up with a syntax warning: <strong>SyntaxWarning: name 'casino' is assigned to before global declaration</strong> </p>