simple threads stack dumper. fancy one can be found here - http://code.activestate.com/recipes/577334-how-to-debug-deadlocked-multi-threaded-programs/

dumper.py

import time
import threading

def stacktraces():
    code = []
    for threadId, stack in sys._current_frames().items():
        code.append("\n# ThreadID: %s" % threadId)
        for filename, lineno, name, line in traceback.extract_stack(stack):
            code.append('File: "%s", line %d, in %s' % (filename, lineno, name))
            if line:
                code.append("  %s" % (line.strip()))
    print("\n".join(code))

def dumper():
    while True:
        time.sleep(5)
        stacktraces()

threading.Thread(target=dumper).start()