參考：

Problem Confirming the SSL Certificate - OSX

OS X EI Captain 下解決 There was a problem confirming the ssl certificate 問題

在安裝 matplotlib 時，出現以下錯誤：

python3 -mpip install matplotlibCollecting matplotlibCould not fetch URL https://pypi.python.org/simple/matplotlib/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:645) - skippingCould not find a version that satisfies the requirement matplotlib (from versions: ) No matching distribution found for matplotlib

解決方法是使用以下方法更新pip：

curl https://bootstrap.pypa.io/get-pip.py | python3

2019.4

轉載于:https://www.cnblogs.com/qq952693358/p/10762566.html

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