[Django, Gevent, SocketIO] Run script to automatically restart Gunicorn when a change is made on a python file

run.py

#!/usr/bin/env python
# -*- coding:Utf-8 -*-
import os
import shlex
import subprocess
import sys
import time

from watchdog.events import FileSystemEventHandler
from watchdog.observers import Observer


class GunicornEventHandler(FileSystemEventHandler):
    """
    Restart the gunicorn process when an event is captured.
    """
    def __init__(self, *args, **kwargs):
        super(GunicornEventHandler, self).__init__(*args, **kwargs)
        self.pid = None
        self.pid_file = "/tmp/gunicorn.pid"
        self.worker_class = "socketio.sgunicorn.GeventSocketIOWorker"

    def get_start_cmd(self):
        return "python manage.py run_gunicorn --worker-class {0} --pid {1}".format(
                        self.worker_class, self.pid_file)

    def on_any_event(self, event):
        super(GunicornEventHandler, self).on_any_event(event)
        #Do the action only for python files
        if event is not None and event.src_path[-3:] != ".py":
            return
        if self.pid:
            os.kill(self.pid, 9)
            time.sleep(1)
        p = subprocess.Popen(shlex.split(self.get_start_cmd()))
        self.pid = p.pid


if __name__ == "__main__":
    path = sys.argv[1] if len(sys.argv) > 1 else "."
    handler = GunicornEventHandler()
    observer = Observer()
    observer.schedule(handler, path, recursive=True)
    observer.start()
    #Triggers an event in order to initially launch the server
    handler.on_any_event(None)
    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        observer.stop()
    observer.join()

To use it, simply run: ./run.py path_to_project

Thanks, works great