设置Virtualenv的问题

Question

我正在尝试使用Python 2.6.5在Ubuntu 10.04上设置virtualenv,但有一些问题.

在用pip安装virtualenv和virtualenv包装器后,我正在运行命令:virtualenv mysite-env --verbose

我收到以下错误:

Creating mysite-env/lib/python2.6
Symlinking Python bootstrap modules
  Symlinking mysite-env/lib/python2.6/lib-dynload
  Symlinking mysite-env/lib/python2.6/config
  Symlinking mysite-env/lib/python2.6/os.py
  Ignoring built-in bootstrap module: posix
  Symlinking mysite-env/lib/python2.6/posixpath.py
  Cannot import bootstrap module: nt
  Symlinking mysite-env/lib/python2.6/ntpath.py
  Symlinking mysite-env/lib/python2.6/genericpath.py
  Symlinking mysite-env/lib/python2.6/fnmatch.py
  Symlinking mysite-env/lib/python2.6/locale.py
  Symlinking mysite-env/lib/python2.6/encodings
  Symlinking mysite-env/lib/python2.6/codecs.py
  Symlinking mysite-env/lib/python2.6/stat.py
  Symlinking mysite-env/lib/python2.6/UserDict.py
  Symlinking mysite-env/lib/python2.6/lib-dynload/readline.so
  Symlinking failed, copying to mysite-env/lib/python2.6/lib-dynload/readline.so
Traceback (most recent call last):
  File "/usr/local/bin/virtualenv", line 9, in <module>
    load_entry_point('virtualenv==1.6.1', 'console_scripts', 'virtualenv')()
  File "/usr/local/lib/python2.6/dist-packages/virtualenv.py", line 795, in main
    never_download=options.never_download)
  File "/usr/local/lib/python2.6/dist-packages/virtualenv.py", line 886, in create_environment
    site_packages=site_packages, clear=clear))
  File "/usr/local/lib/python2.6/dist-packages/virtualenv.py", line 1020, in install_python
    copy_required_modules(home_dir)
  File "/usr/local/lib/python2.6/dist-packages/virtualenv.py", line 974, in copy_required_modules
    copyfile(filename, dst_filename)
  File "/usr/local/lib/python2.6/dist-packages/virtualenv.py", line 414, in copyfile
    copyfileordir(src, dest)
  File "/usr/local/lib/python2.6/dist-packages/virtualenv.py", line 391, in copyfileordir
    shutil.copy2(src, dest)
  File "/usr/lib/python2.6/shutil.py", line 99, in copy2
    copyfile(src, dst)
  File "/usr/lib/python2.6/shutil.py", line 53, in copyfile
    fdst = open(dst, 'wb')
IOError: [Errno 20] Not a directory: 'mysite-env/lib/python2.6/lib-dynload/readline.so'

如果我再次运行它,我得到以下内容:

Directory mysite-env/lib/python2.6 already exists
    Symlinking Python bootstrap modules
      Ignoring built-in bootstrap module: posix
      Cannot import bootstrap module: nt
      Symlinking mysite-env/lib/python2.6/lib-dynload/readline.so
      Symlinking mysite-env/lib/python2.6/copy_reg.py
      Symlinking mysite-env/lib/python2.6/types.py
      Symlinking mysite-env/lib/python2.6/re.py
      Symlinking mysite-env/lib/python2.6/sre.py
      Symlinking mysite-env/lib/python2.6/sre_parse.py
      Symlinking mysite-env/lib/python2.6/sre_constants.py
      Symlinking mysite-env/lib/python2.6/sre_compile.py
      Ignoring built-in bootstrap module: zlib
      Symlinking mysite-env/lib/python2.6/warnings.py
      Symlinking mysite-env/lib/python2.6/linecache.py
      Symlinking mysite-env/lib/python2.6/_abcoll.py
      Symlinking mysite-env/lib/python2.6/abc.py
    Creating mysite-env/lib/python2.6/site-packages
    Writing mysite-env/lib/python2.6/site.py
    Writing mysite-env/lib/python2.6/orig-prefix.txt
    Creating parent directories for mysite-env/include
    Symlinking mysite-env/include/python2.6
    Creating mysite-env/bin
    New python executable in mysite-env/bin/python
    Changed mode of mysite-env/bin/python to 0755
    Testing executable with mysite-env/bin/python -c "import sys; print(sys.prefix)"
    ERROR: The executable mysite-env/bin/python is not functioning
    ERROR: It thinks sys.prefix is u'/usr' (should be '/vagrant/mysite-env')
    ERROR: virtualenv is not compatible with this system or executable

任何想法如何解决这一问题？谢谢!

Answer 1

看起来有点像你问过这个问题./ vagrant目录的Virtualbox文件驱动程序无法识别virtualenv大量使用的符号链接.

这可以通过简单的方式得到最好的证明

mybox:/vagrant$ ln -s ~/.bashrc
ln: failed to create symbolic link ./.bashrc': Protocol error`

更新:

由于流浪汉与符号链接和virtualenv不兼容,我的流浪盒/实例是任务/项目特定的(只有1个virtualenv).所以在vagrant host side/instance文件夹中我会保留一个简短的脚本来安装python&virtualenv,然后再做

pip install -r /vagrant/requirement

可在此处找到更多文档.https://docs.vagrantup.com/v2/provisioning/basic_usage.html

用适当的bash if核对(蟒蛇存在,并/家庭/流浪者/ env的存在),你可以提供你的盒子一次,然后附加一个电话来激活您的〜/ env的安装,这样,当你登录,您已经安装并准备走.

Answer 2

我还没有遇到过这个特定的问题，但我个人已经从使用virtualenv转向pythonbrew. pythonbrew是同一问题的不同解决方案；它的工作方式更像rvm是 Ruby 社区：它从头开始构建完全独立的 Python 版本$HOME/.pythonbrew；然后，它提供了 shell 功能，使您可以轻松地从一个外壳切换到另一个外壳（为您编辑路径等）。它不像 那样轻量级virtualenv，但它也不依赖于 Python 系统，因此整个符号链接问题就消失了。您还可以安装多个 Python 版本，即使它们未安装在基本系统中。

当然，你的里程可能会有所不同，但pythonbrew对我来说效果很好。