player rotation

constants.py

@@ -5,3 +5,4 @@ ASTEROID_MIN_RADIUS = 20
 ASTEROID_KINDS = 3
 ASTEROID_SPAWN_RATE = 0.8  # seconds
 ASTEROID_MAX_RADIUS = ASTEROID_MIN_RADIUS * ASTEROID_KINDS
+PLAYER_TURN_SPEED = 300

main.py

@@ -29,6 +29,8 @@ def main():
 
         pygame.Surface.fill(screen, (0,0,0))
 
+        player.update(dt)
+
         player.draw(screen)
 
         pygame.display.flip() #refresh screen

player.py

@@ -1,6 +1,6 @@
 import pygame
 from circleshape import CircleShape
-from constants import PLAYER_RADIUS
+from constants import PLAYER_RADIUS, PLAYER_TURN_SPEED
 
 
 class Player(CircleShape):
@@ -20,3 +20,15 @@ class Player(CircleShape):
     def draw(self, screen):
         pygame.draw.polygon(screen, (255,255,255), self.triangle(), 2)
 
+    
+    def rotate(self, dt):
+        self.rotation += PLAYER_TURN_SPEED * dt
+
+    def update(self, dt):
+        keys = pygame.key.get_pressed()
+
+        if keys[pygame.K_a]:
+            self.rotate(-dt)
+
+        if keys[pygame.K_d]:
+            self.rotate(dt)