Question

我使用virtualenvwrapper创建虚拟环境，然后尝试使用pip在其中安装django。但是由于python版本中的冲突，我一直收到错误。

$ mkvirtualenv env
$ workon env
$ pip install django
Downloading/unpacking django
Cleaning up...
Exception:
Traceback (most recent call last):
  File "/Users/mingot/virtualenvs/env/lib/python2.7/site-packages/pip/basecommand.py", line 134, in main
    status = self.run(options, args)
  File "/Users/mingot/virtualenvs/env/lib/python2.7/site-packages/pip/commands/install.py", line 236, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
  File "/Users/mingot/virtualenvs/env/lib/python2.7/site-packages/pip/req.py", line 1085, in prepare_files
    url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
  File "/Users/mingot/virtualenvs/env/lib/python2.7/site-packages/pip/index.py", line 201, in find_requirement
    page = self._get_page(main_index_url, req)
  File "/Users/mingot/virtualenvs/env/lib/python2.7/site-packages/pip/index.py", line 554, in _get_page
    return HTMLPage.get_page(link, req, cache=self.cache)
  File "/Users/mingot/virtualenvs/env/lib/python2.7/site-packages/pip/index.py", line 671, in get_page
    resp = urlopen(url)
  File "/Users/mingot/virtualenvs/env/lib/python2.7/site-packages/pip/download.py", line 176, in __call__
    response = self.get_opener(scheme=scheme).open(url)
  File "/Users/mingot/virtualenvs/env/lib/python2.7/site-packages/pip/download.py", line 238, in get_opener
    headers.append(("User-agent", build_user_agent()))
  File "/Users/mingot/virtualenvs/env/lib/python2.7/site-packages/pip/download.py", line 35, in build_user_agent
    _implementation = platform.python_implementation()
  File "/Users/mingot/soft/anaconda/lib/python2.7/platform.py", line 1486, in python_implementation
    return _sys_version()[0]
  File "/Users/mingot/soft/anaconda/lib/python2.7/platform.py", line 1451, in _sys_version
    repr(sys_version))
ValueError: failed to parse CPython sys.version: '2.7.5 (default, Aug 25 2013, 00:04:04) \n[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)]'

在系统中，我正在运行python anaconda：

$ python 
Python 2.7.5 |Anaconda 1.8.0 (x86_64)| (default, Oct 24 2013, 07:02:20) 
[GCC 4.0.1 (Apple Inc. build 5493)] on darwin

并且$PATH设置为

/Users/mingot/soft/anaconda/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/texbin:/opt/X11/bin

在虚拟环境中，python版本是：

(env)$ python
Python 2.7.5 (default, Aug 25 2013, 00:04:04) 
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)] on darwin

和$PATH：

/Users/mingot/virtualenvs/env/bin:/Users/mingot/soft/anaconda/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/texbin:/opt/X11/bin

我理解问题是在虚拟环境中，在执行非anaconda python 2.7.5时，它仍然使用来自anaconda库的platforms.py，导致正则表达式评估中的崩溃{ {3}}。我不关心在虚拟环境中使用哪个python版本。关于如何告诉虚拟环境内部python正确使用platforms.py的任何建议？

谢谢！

Answer 1

我在安装了Anaconda的Mac上遇到了同样的问题。我修复它的方法是搜索platform.py，然后修改以下内容（注释掉一行）：

<强> ORIGINAL

_sys_version_parser = re.compile(
    r'([\w.+]+)\s*'
    '\|[^|]*\|\s*' # version extra
    '\(#?([^,]+),\s*([\w ]+),\s*([\w :]+)\)\s*'
    '\[([^\]]+)\]?')

更改

_sys_version_parser = re.compile(
    r'([\w.+]+)\s*'
    #'\|[^|]*\|\s*' # version extra # Just comment this line out
    '\(#?([^,]+),\s*([\w ]+),\s*([\w :]+)\)\s*'
    '\[([^\]]+)\]?')

这是与virtualenv == 1.10.1和anaconda 1.9.2

Answer 2

我最终做的解决方案是从正确的python版本的库文件中创建虚拟环境库文件夹中platforms.py的符号链接。

$ pwd
/Users/mingot/virtualenvs/env/lib/python2.7
$ ln -s /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/platform.py platform.py

Answer 3

我制定的解决方案是补充virtualenv.py，因此它不仅可以将Python二进制文件复制到新环境，还可以复制随附的libpythonX.Y.so共享库文件。没有它们，微小的Anaconda Python二进制文件（看一下它 - 它的大小只有几千字节）链接系统libpython而不是Anaconda libpython，所以你有系统Python的版本字符串被Anaconda解析了＃39; s变种platform.py代码。

这是一个简短的shell脚本，可以修复virtualenv.py;激活Anaconda环境后运行它并运行pip install virtualenv以使virtualenv工具可用于其中：

https://github.com/brandon-rhodes/homedir/blob/master/bin/%2Cfix-virtualenv-for-anaconda

pip在虚拟环境中执行错误的python库版本

3 个答案: