Modernize the code now that Python 2.5 is no longer supported

- Use print function instead of print statement;
- Use new exception handling;
- Use in operator instead of has_key();
- Do not use tuple arguments in functions;
- Other miscellaneous improvements.

This is based on output of `futurize --stage1`, with some
manual corrections.

1 files changed, 1 insertions, 1 deletions

diff --git a/sphinx/builders/devhelp.py b/sphinx/builders/devhelp.py
index 81d2e6cee..4595c7c29 100644
--- a/sphinx/builders/devhelp.py
+++ b/sphinx/builders/devhelp.py
@@ -94,7 +94,7 @@ class DevhelpBuilder(StandaloneHTMLBuilder):
 
         def istoctree(node):
             return isinstance(node, addnodes.compact_paragraph) and \
-                   node.has_key('toctree')
+                   'toctree' in node
 
         for node in tocdoc.traverse(istoctree):
             write_toc(node, chapters)