interactive Python console that runs alongside Gtk

threadedconsole.py

import code
import os
import threading

from gi.repository import Gtk, GLib


class ThreadedConsole(code.InteractiveConsole):
    # Set this to True to read $PYTHONSTARTUP.
    # This could potentially be a security risk (since it just exec's what
    # could potentially be random Python code!), so it's disabled by default,
    # but if you have a customized .pythonrc.py, it might be useful to enable.
    READ_PYTHONSTARTUP = False

    def interact(self, banner=None):
        if self.READ_PYTHONSTARTUP:
            rc = os.environ.get('PYTHONSTARTUP')
            if rc and os.path.isfile(rc):
                exec(open(rc).read(), self.locals)

        def run():
            super(ThreadedConsole, self).interact(banner)
            # If control gets here, the console exited (e.g. Ctrl-D)
            Gtk.main_quit()

        self.repl_thread = threading.Thread(target=run, daemon=True)
        self.repl_thread.start()

    def runcode(self, code):
        lock = threading.Lock()
        lock.acquire()

        @GLib.idle_add
        def inner():
            # This will run in the GUI thread
            try:
                super(ThreadedConsole, self).runcode(code)
            finally:
                # Release the lock that was acquire()'d above,
                # so the second acquire() below will stop blocking
                lock.release()

        # Make this thread wait until inner() is done
        lock.acquire()
        lock.release()