diff --git a/code/chw_ex_ch15.py b/code/chw_ex_ch15.py
new file mode 100644
index 0000000..a0ea256
--- /dev/null
+++ b/code/chw_ex_ch15.py
@@ -0,0 +1,31 @@
+import numpy as np
+import Point1 as pt
+
+def distance(p1, p2):
+    return np.sqrt((p2.x - p1.x)**2 + (p2.y - p1.y)**2)
+
+def move_rectangle(rect, dx, dy):
+    rect.corner.x += dx
+    rect.corner.y += dy
+
+p = pt.Point()
+p.x = 3
+p.y = 4
+
+q = pt.Point()
+q.x = 5
+q.y = 6
+
+d = distance(p, q)
+print('Distance between points is', d)
+
+box = pt.Rectangle()
+box.width = 10
+box.height = 5
+box.corner = pt.Point()
+box.corner.x = 2
+box.corner.y = 4
+
+move_rectangle(box, 3, 1)
+print('New corner is ', end = "")
+pt.print_point(box.corner)
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