0-island_perimeter.py

0x09-island_perimeter/0-island_perimeter.py

@@ -0,0 +1,23 @@
+#!/usr/bin/python3
+"""
+A module: defines a function that calculates
+the perimeter of an island on a given grid
+"""
+
+
+def island_perimeter(grid):
+    """
+    Returns the perimeter of any notable island in the given grid
+    """
+    length = len(grid)
+    breath = len(grid[0])
+    perimeter = 0
+    for x in range(length):
+        for y in range(breath):
+            if grid[x][y] == 1:
+                perimeter += 4
+                if (y < breath - 1 and grid[x][y + 1] == 1):
+                    perimeter -= 2
+                if (x < length - 1 and grid[x + 1][y] == 1):
+                    perimeter -= 2
+    return perimeter