Fixed multiple session bug for blackjack

src/py/BlackJack.py

@@ -198,6 +198,7 @@ class BlackJack:
         self.playerHand = Hand()
         self.dealerHand = Hand()
         self.ledger = Ledger()
+        self.playing = False
         
     def deal_card(self, hand):
         hand.add_to_hand(self.deck.take_from_deck())
@@ -227,6 +228,12 @@ class BlackJack:
         await send(string)
 
     async def play_game(self, ID, bet, recv, send):
+
+        if self.playing:
+            await send("Game in Progress")
+            return
+        else:
+            self.playing = True
         gameState = INIT
 
         while gameState != OVER:
@@ -328,6 +335,7 @@ class BlackJack:
                     self.deck.shuffle()  
                     await send("Everyday I'm shuffling")         
                 gameState = OVER
+                self.playing = False
 
 def main():
     game = BlackJack()