def run(self):
        """Reload the process if registered files have been modified."""
        for filename in self.sysfiles() | self.files:
            if filename:
                if filename.endswith('.pyc'):
                    filename = filename[:-1]
                
                oldtime = self.mtimes.get(filename, 0)
                if oldtime is None:
                    # Module with no .py file. Skip it.
                    continue
                
                try:
                    mtime = os.stat(filename).st_mtime
                except __HOLE__:
                    # Either a module with no .py file, or it's been deleted.
                    mtime = None
                
                if filename not in self.mtimes:
                    # If a module has no .py file, this will be None.
                    self.mtimes[filename] = mtime
                else:
                    if mtime is None or mtime > oldtime:
                        # The file has been deleted or modified.
                        self.bus.log("Restarting because %s changed." % filename)
                        self.thread.cancel()
                        self.bus.log("Stopped thread %r." % self.thread.getName())
                        self.bus.restart()
                        return
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/cherrypy/cherrypy/process/plugins.py/Autoreloader.run