Adding Python Clamp Function

Clamp a number between a max and a min.

python_utils/clamp.py

+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+def clamp(n, minn, maxn):
+    """Clamp a number between a max and a min value.
+
+    :param n: Number to clamp.
+    :param minn: Minimum number to allow.
+    :param maxn: Maximum number to allow.
+    """
+    return max(min(maxn, n), minn)