Player now pays for what he buys and buying a heart does not put it in the inventory. Solves #38 and #36

squirrelbattle/entities/player.py

@@ -70,6 +70,13 @@ class Player(FightingEntity):
         self.current_xp += xp
         self.level_up()
 
+    def change_hazel_balance(self, hz: int) -> None:
+        """
+        Change the number of hazel the player has by hz. hz is negative
+        when the player loses money and positive when he gains money
+        """
+        self.hazel += hz
+
     # noinspection PyTypeChecker,PyUnresolvedReferences
     def check_move(self, y: int, x: int, move_if_possible: bool = False) \
             -> bool:
@@ -125,6 +132,12 @@ class Player(FightingEntity):
         """
         self.inventory.append(obj)
 
+    def remove_from_inventory(self, obj: Any) -> None:
+        """
+        Removes an object from the inventory
+        """
+        self.inventory.remove(obj)
+
     def save_state(self) -> dict:
         """
         Saves the state of the entity into a dictionary