# HG changeset patch
# User cmlenz
# Date 1174324860 0
# Node ID aa32588342ae3b87f100c2712977d7b3a3a9225d
# Parent  e41c8cff992f93bd8b2ea712d66b52010441c2db
Add support for `len()` to the `Context` class.

diff --git a/genshi/template/base.py b/genshi/template/base.py
--- a/genshi/template/base.py
+++ b/genshi/template/base.py
@@ -127,6 +127,10 @@
             raise KeyError(key)
         return value
 
+    def __len__(self):
+        """Return the number of distinctly named variables in the context."""
+        return len(self.items())
+
     def __setitem__(self, key, value):
         """Set a variable in the current scope."""
         self.frames[0][key] = value