add: as service

Board/__init__.py

@@ -0,0 +1,37 @@
+import itertools
+
+class Board:
+    def __init__(self, width, height, quotient_x, quotient_y):
+        self.width = width
+        self.height = height
+        self.quotient_x = quotient_x
+        self.quotient_y = quotient_y
+        self.lives = set()
+
+    def toggle(self, x, y):
+        if (x, y) in self.lives:
+            self.lives.remove((x, y))
+        else:
+            self.lives.add((x, y))
+
+    def evaluate(self):
+        new_lives = set()
+        for (x, y) in itertools.product(range(self.width), range(self.height)):
+            neighbor_count = 0
+            for (dx, dy) in itertools.product([-1, 0, 1], [-1, 0, 1]):
+                if dx == 0 and dy == 0:
+                    continue
+                nx = x + dx
+                ny = y + dy
+                if self.quotient_x:
+                    nx %= self.width
+                if self.quotient_y:
+                    ny %= self.height
+                if (nx, ny) in self.lives:
+                    neighbor_count += 1
+            if (x, y) in self.lives and neighbor_count in [2, 3]:
+                new_lives.add((x, y))
+            if (x, y) not in self.lives and neighbor_count == 3:
+                new_lives.add((x, y))
+        self.lives = new_lives
+