Use SpriteCircle's center_x and center_y in snow example

Author: pushfoo

arcade/examples/snow.py

@@ -25,8 +25,8 @@ class Snowflake(arcade.SpriteCircle):
     Based on drawing filled-circles.
     """
 
-    def __init__(self, size, speed, drift):
-        super().__init__(size, arcade.color.WHITE)
+    def __init__(self, size, speed, drift, center_x: float = 0, center_y: float = 0):
+        super().__init__(size, arcade.color.WHITE, center_x=center_x, center_y=center_y)
         self.speed = speed
         self.drift = drift
 
@@ -37,7 +37,7 @@ def reset_pos(self):
             random.randrange(WINDOW_HEIGHT, WINDOW_HEIGHT + 100),
         )
 
-    def update(self, delta_time: float = 1/60) -> None:
+    def update(self, delta_time: float = 1 / 60) -> None:
         self.center_y -= self.speed * delta_time
 
         # Check if snowflake has fallen below screen
@@ -50,10 +50,10 @@ def update(self, delta_time: float = 1/60) -> None:
 
 
 class GameView(arcade.View):
-    """ Main application class. """
+    """Main application class."""
 
     def __init__(self):
-        """ Initializer """
+        """Initializer"""
         # Calls "__init__" of parent class (arcade.Window) to setup screen
         super().__init__()
 
@@ -66,38 +66,36 @@ def __init__(self):
         self.background_color = arcade.color.BLACK
 
     def start_snowfall(self):
-        """ Set up snowfall and initialize variables. """
+        """Set up snowfall and initialize variables."""
         for i in range(SNOWFLAKE_COUNT):
             # Create snowflake instance
             snowflake = Snowflake(
                 size=random.randrange(1, 4),
                 speed=random.randrange(20, 40),
                 drift=random.uniform(math.pi, math.pi * 2),
-            )
-            # Randomly position snowflake
-            snowflake.position = (
-                random.randrange(WINDOW_WIDTH),
-                random.randrange(WINDOW_HEIGHT + 200),
+                # Randomly position snowflake
+                center_x=random.randrange(WINDOW_WIDTH),
+                center_y=random.randrange(WINDOW_HEIGHT + 200),
             )
             # Add snowflake to snowflake list
             self.snowflake_list.append(snowflake)
 
     def on_draw(self):
-        """ Render the screen. """
+        """Render the screen."""
         # Clear the screen to the background color
         self.clear()
 
         # Draw the current position of each snowflake
         self.snowflake_list.draw()
 
     def on_update(self, delta_time):
-        """ All the logic to move, and the game logic goes here. """
+        """All the logic to move, and the game logic goes here."""
         # Call update on all the snowflakes
         self.snowflake_list.update(delta_time)
 
 
 def main():
-    """ Main function """
+    """Main function"""
     # Create a window class. This is what actually shows up on screen
     window = arcade.Window(WINDOW_WIDTH, WINDOW_HEIGHT, WINDOW_TITLE)