导致这个错误的原因,其实错误信息里面已经提示了:
Download error on https://pypi.org/simple/pbr/: unknown url type: https -- Some packages may not be found!
Couldn't find index page for 'pbr' (maybe misspelled?)
Download error on https://pypi.org/simple/: unknown url type: https -- Some packages may not be found!
说白了就是网络的问题!!!
所以,单独pip install pbr
后,当然前提是你的更换pip的源,否则它去pypi下载还是会失败!再次执行pip install virtualenvwrapper
就好了。