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我建立了一個新的virtualenv。從內部來看，pip找不到任何分佈。在環境之外，它可以。下面是輸出：pip無法從virtualenv內找到分佈
(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，以及創建使用virtualenvwrapper虛擬環境。 $ mkvirtualenv <env name>
這發生在所有軟件包上，而不僅僅是django。
編輯：只有類似的事情，我已經在我的搜索發現：https://github.com/pypa/pip/issues/829