update template code

mmp/a4/anchor_grid.py

@@ -0,0 +1,12 @@
+from typing import Sequence
+import numpy as np
+
+
+def get_anchor_grid(
+    num_rows: int,
+    num_cols: int,
+    scale_factor: float,
+    anchor_widths: Sequence[float],
+    aspect_ratios: Sequence[float],
+) -> np.ndarray:
+    raise NotImplementedError()