python 安装环境 初版

wheel opencv-python numpy pillow opencv-contrib-python  pyrealsense2

pip 更新：python -m pip install --upgrade pip

pip 修复：python -m ensurepip

pip 更新：python -m pip install --upgrade pip

pip runtime out: pip --default-timeout=900 install --upgrade pip

pip 配置文件：放在C:\Users\Administrator\pip文件加下

[global]
timeout = 6000
index-url = http://pypi.douban.com/simple/
[install]
trusted-host = pypi.douban.com