使用pip安装python包的时候,常常会出现如下相似的错误python
(test) dongchang-5:test baoshan$ pip3 install requests Collecting requests Could not fetch URL https://pypi.python.org/simple/requests/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:645) - skipping Could not find a version that satisfies the requirement requests (from versions: ) No matching distribution found for requests
出现这个错误的缘由是python.org已经不支持TLSv1.0和TLSv1.1了。更新pip能够解决这个问题。linux
可是若是使用传统的python -m pip install --upgrade pip的方式,仍是会出现那个问题。macos
这是一个相互矛盾的问题,你由于TLS证书的问题须要去升级pip,升pip的时候又由于TLS证书的缘由不能下载最新版本的pip。bootstrap
所以只能手动的去升级pip。bash
mac或者linux操做系统:在终端下执行命令:curl
curl https://bootstrap.pypa.io/get-pip.py | python。
而后再使用pip安装软件包fetch
(test) dongchang-5:test baoshan$ pip3 install numpy Collecting numpy Downloading https://files.pythonhosted.org/packages/10/59/da8c94da6eaa44651c254dbaec2c901544ab1f88f410c47e2d3092e2d88f/numpy-1.15.0-cp35-cp35m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (24.4MB) 100% |████████████████████████████████| 25.3MB 298kB/s Installing collected packages: numpy Successfully installed numpy-1.15.0
overui
参考:https://blog.csdn.net/nunchakushuang/article/details/80049528url