我正在尝试为我的项目使用渠道。我按照本教程Raspberry PI 和 Django Channels来开发我的项目。但是运行服务器python3 manage.py runsever给了我下面的错误。
root@raspberrypi:/home/pi/sensor# python3 manage.py runserver 0:8000
:0: UserWarning: You do not have a working installation of the service_identity module: 'cannot import name 'opentype''. Please install it from <https://pypi.python.org/pypi/service_identity> and make sure all of its dependencies are satisfied. Without the service_identity module, Twisted can perform only rudimentary TLS client hostname verification. Many valid certificate/hostname mappings may be rejected.
:0: UserWarning: You do not have a working installation of the service_identity module: …