A smart trace() command
A number of people have kindly posted snippets on how to use pdb/ipdb with django. However, this only works when running the django development server. I thought it would be nice to have a trace() command that would turn into a no-op when the development server is not running, so you wouldn't have to worry about leaving trace() commands in your code if you want to quickly test with mod_wsgi or mod_python. The code above attempts (on Posix-like systems) to determine if the development server is running (by quickly checking if "manage.py runserver" is in the process list), and sets a DJANGO_SERVER setting appropriately. Then when you import the trace() method, it is defined as set_trace() if DJANGO_SERVER is True, or a no-op if DJANGO_SERVER is False. When you hit the trace() in pdb/ipdb, enter "u" to go up to the calling trace() statement.
- debugging