【已解决】MAC 使用pip安装包提示TLS证书错误解决办法

好久没用pip，突然就有

There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:661) - skipping

No matching distribution found for xlrd

Could not fetch URL https://pypi.python.org/simple/xlrd/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:661) - skipping

Could not find a version that satisfies the requirement xlrd (from versions: )

找了一圈说用curl https://bootstrap.pypa.io/get-pip.py | python

可是不太管用，我从https://pypi.org/simple/pip/网站上，找了pip9.0.3.tar.gz下载下来，然后解压到/User/{你的用户名}下，解压，然后pip install ./pip-9.0.3/就好了~