wozek no longer "pops" when picking up a package

wozek.py

@@ -3,8 +3,9 @@ import pygame,math
 from packageList import listOfPackages
 
 
-class Wozek():
+class Wozek(pygame.sprite.Sprite):
     def __init__(self):
+        super().__init__()
         self.obecnyStan = None
         # self.x = 55
         # self.y = 55
@@ -13,12 +14,14 @@ class Wozek():
         self.height = 64
         self.width = 64
         self.image = pygame.image.load("images/pusty_wozek.png")
+        self.rect = self.image.get_rect()
         # Credit: Forklift icons created by Smashicons - Flaticon
         # https://www.flaticon.com/free-icons/forklift
         self.__zainicjuj_stan_poczatkowy()
 
     def draw(self):
         ekran.screen.blit(self.image, (self.obecnyStan.x, self.obecnyStan.y))
+        # self.update_position(self.obecnyStan.x, self.obecnyStan.y)
 
     #storage = ["none"] * 10 
     storage = []
@@ -39,6 +42,11 @@ class Wozek():
         else:
             print("I'm empty!")
     
+    def update_position(self, x, y):
+        self.obecnyStan.x = x
+        self.obecnyStan.y = y
+        self.rect.topleft = (x, y)
+    
     def dynamic_wozek_picture(self):
         if self.ln == 0:
             self.image = pygame.image.load("images/pusty_wozek.png")
@@ -49,6 +57,8 @@ class Wozek():
         elif (self.ln == 10):
             self.image = pygame.image.load("images/pelny_wozek_full_3_crates.png")
         
+        self.rect = self.image.get_rect()
+
 
     def load_package(self):
         for package in listOfPackages.list:
@@ -56,12 +66,21 @@ class Wozek():
             if dist <= 50:
                 self.add_element(package)
                 listOfPackages.list.pop()
+
+    def load_packages_collision(self):
+        pass
+        # packages_collision = pygame.sprite.spritecollide(self, listOfPackages.package_group, False)
+        # if packages_collision:
+        #     for package in packages_collision:
+        #         self.add_element(package)
+        #         listOfPackages.list.remove(package)       # collision doesn't work, collision always happens
+
     def drop_package(self):
         package = self.remove_element()
         if package is not None:
-            listOfPackages.list.append(package)
-            package.x = self.obecnyStan.x+50
+            package.x = self.obecnyStan.x
             package.y = self.obecnyStan.y
+            listOfPackages.list.append(package)
 
     def __zainicjuj_stan_poczatkowy(self):
         from wyszukiwanie import Stan