--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/experiments/tracer.py	Tue Feb 16 10:07:05 2010 +0530
@@ -0,0 +1,36 @@
+################################################################################
+# Copyright (c) 2010 Nokia Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+################################################################################
+
+# From http://www.dalkescientific.com/writings/diary/archive/2005/04/20/tracing_python_code.html
+import sys
+import linecache
+import random
+
+def traceit(frame, event, arg):
+    if event == "line":
+        lineno = frame.f_lineno
+        filename = frame.f_globals.get("__file__", "<nofilename>")
+        if filename == "<stdin>":
+            filename = "traceit.py"
+        if (filename.endswith(".pyc") or
+            filename.endswith(".pyo")):
+            filename = filename[:-1]
+        name = frame.f_globals.get("__name__", "<noname>")
+        line = linecache.getline(filename, lineno)
+        # Modify the name below to trace only a particular .py file
+        if name in ['httplib']:
+            print "%s:%s: %s" % (name, lineno, line.rstrip())
+    return traceit