From 6603e2cb2052a7ac4fdede284db53bfcac5ae595 Mon Sep 17 00:00:00 2001
From: Joe Shochet <shochet@gmail.com>
Date: Thu, 9 Aug 2001 01:32:38 +0000
Subject: [PATCH] *** empty log message ***

---
 direct/src/showbase/PythonUtil.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/direct/src/showbase/PythonUtil.py b/direct/src/showbase/PythonUtil.py
index e3fb7fdbd6..c123b69412 100644
--- a/direct/src/showbase/PythonUtil.py
+++ b/direct/src/showbase/PythonUtil.py
@@ -323,6 +323,17 @@ def intersection(a, b):
                 d.append(i)
     return d   
 
+def union(a, b):
+    """
+    union(list, list):
+    """
+    # Copy a
+    c = a[:]
+    for i in b:
+        if (i not in c):
+            c.append(i)
+    return c
+
 def reduceAngle(deg):
     """
     Reduces an angle (in degrees) to a value between -180. and 180.