From Sidnei: Import iterparse from xml.etree when available (eg: Python 2.6).

(see http://lists.supervisord.org/pipermail/supervisor-users/2010-June/000598.html).

CHANGES.txt

@@ -1,5 +1,7 @@
 Next release
 
+  - Import iterparse from xml.etree when available (eg: Python 2.6).
+
   - When parsing "environment=" in the config file, changes introduced in
     3.0a8 prevented Supervisor from parsing some characters commonly
     found in paths unless quoting was used as in this example:

src/supervisor/xmlrpc.py

@@ -527,8 +527,19 @@ def gettags(comment):
 
     return tags
 
+
 try:
-    from cElementTree import iterparse
+    # Python 2.6 contains a version of cElementTree inside it.
+    from xml.etree.ElementTree import iterparse
+except ImportError:
+    try:
+        # Failing that, try cElementTree instead.
+        from cElementTree import iterparse
+    except ImportError:
+        iterparse = None
+
+
+if iterparse is not None:
     import datetime, time
     from base64 import decodestring
 
@@ -565,7 +576,5 @@ try:
             elif elem.tag == "params":
                 params = tuple([v.text for v in elem])
         return params, method
-
-except ImportError:
+else:
     loads = None
-