续lnmp 1.4在阿里云服务器上增加ssl出现错误 填坑以后,AWS也出现类似这样的问题.
在运行virtualenv安装的时候
pip install --upgrade virtualenv
virtualenv env如果出现类似这样的错误
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/pkg_resources.py", line 444, in _build_master
ws.require(__requires__)
File "/usr/lib/python3/dist-packages/pkg_resources.py", line 725, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python3/dist-packages/pkg_resources.py", line 632, in resolve
raise VersionConflict(dist,req) # XXX put more info here
pkg_resources.VersionConflict: (virtualenv 15.0.0 (/usr/local/lib/python3.4/dist-packages), Requirement.parse('virtualenv==13.1.2'))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/bin/virtualenv", line 5, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python3/dist-packages/pkg_resources.py", line 2749, in <module>
working_set = WorkingSet._build_master()
File "/usr/lib/python3/dist-packages/pkg_resources.py", line 446, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/lib/python3/dist-packages/pkg_resources.py", line 459, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/lib/python3/dist-packages/pkg_resources.py", line 628, in resolve
raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: virtualenv==13.1.从错误提示可以看出，virtualenv版本冲突了。可是我们刚才不是已经更新了virtualenv的版本了吗。于是谷歌，找到一个答案说需要安装python3，并将系统默认的python指向它。照做了，然并卵还是没用。
后来想到，亚马逊的系统默认是没pip,所以不是pip安装，而是easy_install，简直挖坑挖的太大了。于是，我运行了下面的命令。
easy_install --upgrade virtualenv再尝试了下，嗯问题解决!
