imenu-example--python-class-regexp,
imenu-example--python-method-regexp,
imenu-example--python-method-no-arg-parens,
imenu-example--python-method-arg-parens,
imenu-example--generic-python-expression,
imenu-example--python-generic-regexp,
imenu-example--python-generic-parens): New variables.

(imenu-example--create-python-index,
imenu-example--create-python-index-engine): New functions.

right thing.

(py-comment-region): let-bind comment-start to "## " so commented
regions get transformed into non-indenting comment lines.

(py-compute-region): Implement modification to rule for recognizing
"indenting comment lines".

- Added PyMac_BuildNumVersion

column zero.  Perhaps a kludge, but similar in nature to Emacs'
beginning-of-defun shortcut.

level after a return, raise, break, or continue statement.

Clarified some comments.