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我建立了一个新的virtualenv。从内部来看，pip找不到任何分布。在环境之外，它可以。下面是输出：pip无法从virtualenv内找到分布
(wagon-admin)[[email protected] wagon-admin]$ pip install Django
Downloading/unpacking Django
Could not fetch URL https://pypi.python.org/simple/Django/: There was a problem confirming the ssl certificate: <urlopen error [Errno 1] _ssl.c:480: error:0D0890A1:asn1 encoding routines:ASN1_verify:unknown message digest algorithm>
Will skip URL https://pypi.python.org/simple/Django/ when looking for download links for Django
Could not fetch URL https://pypi.python.org/simple/: There was a problem confirming the ssl certificate: <urlopen error [Errno 1] _ssl.c:480: error:0D0890A1:asn1 encoding routines:ASN1_verify:unknown message digest algorithm>
Will skip URL https://pypi.python.org/simple/ when looking for download links for Django
Cannot fetch index base URL https://pypi.python.org/simple/
Could not fetch URL https://pypi.python.org/simple/Django/: There was a problem confirming the ssl certificate: <urlopen error [Errno 1] _ssl.c:480: error:0D0890A1:asn1 encoding routines:ASN1_verify:unknown message digest algorithm>
Will skip URL https://pypi.python.org/simple/Django/ when looking for download links for Django
Could not find any downloads that satisfy the requirement Django
No distributions at all found for Django
Storing complete log in /Users/me/.pip/pip.log
我在OSX，以及创建使用virtualenvwrapper虚拟环境。 $ mkvirtualenv <env name>
这发生在所有软件包上，而不仅仅是django。
编辑：只有类似的事情，我已经在我的搜索发现：https://github.com/pypa/pip/issues/829