Is there a way to attach a debugger to a multi-threaded Python process?

Question

I\'m trying to debug a deadlock in a multi-threaded Python application after it has locked up. Is there a way to attach a debugger to inspect the state of the process?

Answer 1

Yeah, gdb is good for lower level debugging.

You can change threads with the thread command.

e.g

(gdb) thr 2
[Switching to thread 2 (process 6159 thread 0x3f1b)]
(gdb) backtrace
....

You could also check out Python specific debuggers like Winpdb, or pydb. Both platform independent.