我尝试创建新项目时遇到问题。将Django从1.8版本更新为1.9后会发生这种情况。所以当我使用命令时：
django-admin.py startproject myproject
我有错误：
CommandError: /var/www/myproject/manage.py already exists, overlaying a project or app into an existing directory won't replace conflicting files
当我输入此命令时：
django-admin startproject myproject
我有这个错误：
Traceback (most recent call last):
File "/usr/local/bin/django-admin", line 5, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2749, in <module>
working_set = WorkingSet._build_master()
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 446, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 459, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 628, in resolve
raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: Django==1.9
所以根据这个post，我检查django-admin.py的路径并检查django，它也一样。我尝试使用pip删除并安装django，但我仍然遇到了同样的错误。
如果有人帮助我，我会很高兴的。谢谢！