pip install channels error in mac

1.问题描述

在mac上安装channels包报以下错误

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
  error: command 'gcc' failed with exit status 1
  ----------------------------------------
  ERROR: Failed building wheel for twisted
  Running setup.py clean for twisted
Failed to build twisted
Installing collected packages: twisted, daphne, channels
    Running setup.py install for twisted ... error
    ERROR: Command errored out with exit status 1:

ERROR: Command errored out with exit status 1: /Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/pm/t_gvmn156qn6yf7vmsvl6r1c0000gn/T/pip-install-cp5zeh_9/twisted/setup.py'"'"'; __file__='"'"'/private/var/folders/pm/t_gvmn156qn6yf7vmsvl6r1c0000gn/T/pip-install-cp5zeh_9/twisted/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/pm/t_gvmn156qn6yf7vmsvl6r1c0000gn/T/pip-record-ekw0uj6s/install-record.txt --single-version-externally-managed --compile Check the logs for full command output.

报错特别长

2. 解决

xcode-select --install

3. 参考

https://stackoverflow.com/questions/47400675/error-on-pip-install-u-channels-command-using-for-otree-running-setup-py-bdi