In the Python debug console, there are a couple of issues:

1 - After outputting messages (to stdout, or debug messages), the cursor isn't positioned at the start of the next command line.  It has to be moved there with the mouse or arrow keys before you can input a new command.

2 - The usual command line editing up-arrow keys don't work in the debug console.  Up-arrow usually retrieves previous input lines, for editing and re-submission.

Some side comments (I won't post separate bug reports for these):

* Debugging is very slow to respond, esp. while single-stepping while watching variables.

* The variable watch window seems cluttered with _all_ local variables rather than just the ones I'm interested in (maybe I haven't learned how to do this properly)

* In general, the debugger seems quite unstable.  It crashes a lot - I know some of the causes (will post separate issues for those), but often it crashes while debugging for reasons I can't determine or reproduce.

Although it is possible to use Python with NetBeans with the current state, it is very painful - I'm going to go looking for another platform until it becomes more stable.