1 files changed, 15 insertions, 0 deletions
diff --git a/repoze/bfg/decorator.py b/repoze/bfg/decorator.py
new file mode 100644
index 000000000..69c1e65e2
--- /dev/null
+++ b/repoze/bfg/decorator.py
@@ -0,0 +1,15 @@
+class reify(object):
+
+    """ Put the result of a method which uses this (non-data)
+    descriptor decorator in the instance dict after the first call,
+    effectively replacing the decorator with an instance variable."""
+
+    def __init__(self, wrapped):
+        self.wrapped = wrapped
+
+    def __get__(self, inst, objtype=None):
+        if inst is None:
+            return self
+        val = self.wrapped(inst)
+        setattr(inst, self.wrapped.__name__, val)
+        return val