When editing Python text, I usually use emacs on Linux and XEmacs on Windows. However, I would love a cross-platform Python development environment in the style of Visual Slickedit or similar. It should have code-completion (for the umpteenth time, dabbrev in emacs is NOT code-completion!), it should show calltips (incorporating the relevant docstrings) when I’m instantiating objects or calling functions and it should have some kind of graphical object browser. It’s syntax highlighting and auto-indentation should be at least as good as that of emacs. Emacs has caught numerous programming errors before they even happened due to its auto-indentation.