Clear cyclic references in the parser and the emitter to avoid extra GC calls.

git-svn-id: http://svn.pyyaml.org/pyyaml/trunk@377 18f92427-320e-0410-9341-c67f048884a3

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/yaml/emitter.py b/lib/yaml/emitter.py
index 4cb2c8a..e5bcdcc 100644
--- a/lib/yaml/emitter.py
+++ b/lib/yaml/emitter.py
@@ -103,6 +103,11 @@ class Emitter(object):
         self.analysis = None
         self.style = None
 
+    def dispose(self):
+        # Reset the state attributes (to clear self-references)
+        self.states = []
+        self.state = None
+
     def emit(self, event):
         self.events.append(event)
         while not self.need_more_events():