(py-execute-import-or-reload): Cool new command that imports or
reloads the current file as a module, so as not to clutter the global
namespace.  Bound to C-c C-m.

(py-execute-def-or-class): New command that sends the current def or
class to the interpreter.  Bound to C-M-x.

(py-execute-string): New command that sends arbitrary string to the
interpreter.  Not bound by default.

(py-describe-mode): Doco updates.