xdot.py 文件源码

def run_filter(self, dotcode):
        if not self.filter:
            return dotcode
        p = subprocess.Popen(
            [self.filter, '-Txdot'],
            stdin=subprocess.PIPE,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            shell=False,
            universal_newlines=True
        )
        xdotcode, error = p.communicate(dotcode)
        sys.stderr.write(error)
        if p.returncode != 0:
            dialog = gtk.MessageDialog(type=gtk.MESSAGE_ERROR,
                                       message_format=error,
                                       buttons=gtk.BUTTONS_OK)
            dialog.set_title('Dot Viewer')
            dialog.run()
            dialog.destroy()
            return None
        return xdotcode