我正在尝试在Openshift中设置一个python应用程序。我使用的是python-2.7磁带。我的一个依赖项是oauth2client。
每当我尝试这样做时，oauth2client的安装会尝试安装加密，然后长时间没有输出，然后突然失败说remote end hung up unexpectedly.
随后我无法安装oauth2client，因为我收到此错误：
pip can't proceed with requirement 'cryptography>=0.7 (from pyopenssl>=0.15.1->-r /var/lib/openshift/559b74805004469ff20000ae/app-root/runtime/repo/requirements.txt (line 6))' due to a pre-existing build directory.
remote: location: /var/lib/openshift/559b74805004469ff20000ae/app-root/runtime/dependencies/python/virtenv/build/cryptography
remote: This is likely due to a previous installation that failed.
remote: pip is being responsible and not assuming it can delete this.
remote: Please delete it and try again.
当我尝试删除该目录时，我发现app-root/runtime/dependencies/python/virtenv存在，但它没有构建子目录。不过我仍然遇到同样的错误。
如何让oauth2client工作？如何清理失败的pip安装？
我已经删除并重新创建了一次应用，只是为了面对同样的问题。