Question

我是python的新手，我想安装virtualenv做某事。

我尝试使用pip和easy_install进行安装，但收到有关发行问题的错误消息。

我的操作系统是MacOS 10.12.6，以前我在系统中安装了pycharm。

这是sys.path

['', '/Library/Python/2.7/site-packages', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/Library/Python/2.7/site-packages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC']

easy_install

sudo easy_install virtualenv

Searching for virtualenv
Reading https://pypi.python.org/simple/virtualenv/
Download error on https://pypi.python.org/simple/virtualenv/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) -- Some packages may not be found!
Couldn't find index page for 'virtualenv' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading https://pypi.python.org/simple/
Download error on https://pypi.python.org/simple/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) -- Some packages may not be found!
No local packages or download links found for virtualenv
error: Could not find suitable distribution for Requirement.parse('virtualenv')

点

sudo pip install virtualenv

The directory '/Users/posen/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/Users/posen/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting virtualenv
  Could not fetch URL https://pypi.python.org/simple/virtualenv/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) - skipping
  Could not find a version that satisfies the requirement virtualenv (from versions: )
No matching distribution found for virtualenv

我无法理解正在发生的事情，有人可以建议我如何解决此问题吗？

Answer 1

problem的出现是由于pip的版本较旧。要解决此问题，您可以使用此命令将pip升级到最新版本。

io.emit('noEvent',{});

Answer 2

解决问题的步骤如下：

升级 PIP pip install --upgrade pip
升级 virtualenv pip install --upgrade virtualenv

为什么我不能安装virtualenv？什么是没有匹配的分配错误？

2 个答案: