#!/usr/bin/env python
"""A stripped down version of Fernando Perez's multi-threaded shell
Demonstrates a bug in the readline module causing the Python 
interpreter to segfault"""

__author__ = ["Fernando Perez <Fernando.Perez@colorado.edu>", 
                "Yariv Ido <yariv@vipe.technion.ac.il>"]

import code
import threading
import time

import readline
import rlcompleter
    

class MTConsole(code.InteractiveConsole):
    """Simple multi-threaded shell"""

    def __init__(self, *args, **kw):
        code.InteractiveConsole.__init__(self,*args,**kw)

        readline.parse_and_bind('tab: complete')

    def doNothing(self):
        # Allow other threads to run
        time.sleep(0)


class SegFaultInterpreter(threading.Thread):
    def __init__(self):
        super(SegFaultInterpreter, self).__init__()
        self.shell = MTConsole()

    def run(self):
        self.shell.interact("Rapidly press 'TAB' a couple of times")

    def mainloop(self):
        self.start()
        while True:
            self.shell.doNothing()

if __name__ == '__main__':
    SegFaultInterpreter().mainloop()