python库文件下载地址（持续更新）

numpy

https://pypi.org/project/numpy/#files

PIL

https://pypi.org/simple/pillow/

cv2

https://pypi.tuna.tsinghua.edu.cn/simple/opencv-python/

openpyxl

https://pypi.python.org/packages/source/o/openpyxl/openpyxl-2.3.1.tar.gz

pmw

http://pmw.sourceforge.net/