keep_alive call policy (analogous to Boost.Python's with_custodian_and_ward, fixes #62)
diff --git a/example/example13.py b/example/example13.py
new file mode 100644
index 0000000..ad0176e
--- /dev/null
+++ b/example/example13.py
@@ -0,0 +1,46 @@
+from __future__ import print_function
+import sys
+import gc
+sys.path.append('.')
+
+from example import Parent, Child
+
+if True:
+ p = Parent()
+ p.addChild(Child())
+ gc.collect()
+ print(p)
+ p = None
+
+gc.collect()
+print("")
+
+if True:
+ p = Parent()
+ p.returnChild()
+ gc.collect()
+ print(p)
+ p = None
+
+gc.collect()
+print("")
+
+if True:
+ p = Parent()
+ p.addChildKeepAlive(Child())
+ gc.collect()
+ print(p)
+ p = None
+gc.collect()
+print("")
+
+if True:
+ p = Parent()
+ p.returnChildKeepAlive()
+ gc.collect()
+ print(p)
+ p = None
+
+gc.collect()
+print("")
+print("Terminating..")