Could not fetch URL https://pypi

Could not fetch URL https://pypi.python.org/simple/opencv-python/: There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661) - skipping

证书问题

1. 升级 pip

• pip 本身都要问题，故 pip install pip 不可用

• 手动安装

steps:

1. https://pypi.org/project/pip/

2. 解压

tar -zxvf

3. python setup.py install

4. success

2. 跳过 ssl 校验

使用一下命令安装

pip --trusted-host pypi.python.org install <包名>