Fix width and height calculations

tetris.py

@@ -76,22 +76,25 @@ class Tetromino(NamedTuple):
     @property
     @lru_cache(maxsize=16)
     def bounding_box_width(self):
-        def ctz(arr: list):
-            for i, c in enumerate(reversed(arr)):
-                if c:
-                    return i
-            return len(arr)
-
-        return max(map(lambda r: len(r) - ctz(r), self.shape))
+        start = self.width
+        end = 0
+        for row in self.shape:
+            for x, cell in enumerate(row):
+                if cell:
+                    end = max(end, x + 1)
+                    start = min(start, x)
+        return end - start
 
     @property
     @lru_cache(maxsize=16)
     def bounding_box_height(self):
-        for y, row in reversed(list(enumerate(self.shape))):
-            for x, cell in enumerate(row):
-                if cell:
-                    return y + 1
-        return 0
+        start = self.height
+        end = 0
+        for y, row in enumerate(self.shape):
+            if any(row):
+                end = max(end, y + 1)
+                start = min(start, y)
+        return end - start
 
     def rotated(self, times: int):
         """Return self rotated TIMES times to the right."""