在阿里云上面的服务器有一台服务器，我已经安装好pip和virtualenv，我通过

virtualenv venv

创建虚拟环境的时候提示的错误信息如下

root@Wireless:~/flasky# virtualenv venv

Running virtualenv with interpreter /usr/bin/python2

New python executable in /root/flasky/venv/bin/python2

Not overwriting existing python script /root/flasky/venv/bin/python (you must use /root/flasky/venv/bi                                                                                          n/python2)

Please make sure you remove any previous custom paths from your /root/.pydistutils.cfg file.

Installing setuptools, pkg_resources, pip, wheel...

Complete output from command /root/flasky/venv/bin/python2 - setuptools pkg_resources pip wheel:

Collecting setuptools

Downloading http://mirrors.aliyun.com/pypi/packages/a7/62/3995dc3067cbf8d4a13ddac0f87417b9a08799c586                                                                                          b3faa77d62ad9085de/setuptools-34.1.0-py2.py3-none-any.whl (389kB)

Collecting pkg_resources

Exception:

Traceback (most recent call last):

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/basecommand.py", line 209, in main

status = self.run(options, args)

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/commands/install.py", line 328, in                                                                                           run

wb.build(autobuilding=True)

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/wheel.py", line 748, in build

self.requirement_set.prepare_files(self.finder)

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/req/req_set.py", line 360, in prep                                                                                          are_files

ignore_dependencies=self.ignore_dependencies))

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/req/req_set.py", line 512, in _pre                                                                                          pare_file

finder, self.upgrade, require_hashes)

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/req/req_install.py", line 273, in                                                                                           populate_link

self.link = finder.find_requirement(self, upgrade)

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/index.py", line 442, in find_requi                                                                                          rement

all_candidates = self.find_all_candidates(req.name)

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/index.py", line 400, in find_all_c                                                                                          andidates

for page in self._get_pages(url_locations, project_name):

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/index.py", line 545, in _get_pages

page = self._get_page(location)

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/index.py", line 648, in _get_page

return HTMLPage.get_page(link, session=self.session)

File "/usr/share/python-wheels/pip-8.1.1-py2.py3-none-any.whl/pip/index.py", line 760, in get_page

resp.raise_for_status()

File "/root/flasky/venv/share/python-wheels/requests-2.9.1-py2.py3-none-any.whl/requests/models.py",                                                                                           line 840, in raise_for_status

raise HTTPError(http_error_msg, response=self)

HTTPError: 404 Client Error: Not Found for url: http://mirrors.aliyun.com/pypi/simple/pkg-resources/

----------------------------------------

...Installing setuptools, pkg_resources, pip, wheel...done.

Traceback (most recent call last):

File "/usr/lib/python3/dist-packages/virtualenv.py", line 2363, in <module>

main()

File "/usr/lib/python3/dist-packages/virtualenv.py", line 719, in main

symlink=options.symlink)

File "/usr/lib/python3/dist-packages/virtualenv.py", line 988, in create_environment

download=download,

File "/usr/lib/python3/dist-packages/virtualenv.py", line 918, in install_wheel

call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)

File "/usr/lib/python3/dist-packages/virtualenv.py", line 812, in call_subprocess

% (cmd_desc, proc.returncode))

OSError: Command /root/flasky/venv/bin/python2 - setuptools pkg_resources pip wheel failed with error                                                                                           code 2

我发现我的系统里有3个版本的pip，如下

pip 9.0.1 from /usr/local/lib/python2.7/dist-packages (python 2.7)

root@Wireless:~/flasky# pip3 -V

pip 9.0.1 from /usr/local/lib/python3.5/dist-packages (python 3.5)

root@Wireless:~/flasky# pip2 -V

pip 8.1.1 from /usr/lib/python2.7/dist-packages (python 2.7)

我尝试过升级pip，但最后那个pip8.1无法升级到pip9，好像最高版本就是pip8，我

试过用以下命令进行升级：

pip install -U pip

pip install -U pip2

pip install -U pip3

pip2 install -U pip

pip2 install -U pip2

pip2 install -U pip3

pip3 install -U pip

pip3 install -U pip2

pip3 install -U pip3

试试下面这个

virtualenv venv --python=python3.5

首先你得确认该使用哪个版本的

pip

，如有必要可以这样尝试安装

pip3 install virtualenv

，再执行上面的命令。