windows下安装OpenSlide-Python

• 下载openslide bins for windows:
  https://openslide.org/download/

• 解压bins后, 将bins添加到系统环境变量里
  https://stackoverflow.com/a/43987218/2268680

• 安装VS Buildtools:
  https://stackoverflow.com/a/52467429/2268680

• 用Native Tools VS2017下进入虚拟环境安装OpenSlide-Python:

pip install openslide-python

• 任意命令行下启动OpenSlide-Python的sample即可:

python deepzoom_server.py "D:\NDPIs\831105-1 - 2018-12-07 19.17.04.ndpi" -p 5000

other refs:
https://stackoverflow.com/a/45918595/2268680