python包镜像地址:
https://pypi.tuna.tsinghua.edu.cn/simple
http://mirrors.aliyun.com/pypi/simple/
http://pypi.douban.com/simple/
http://pypi.hustunique.com/
http://pypi.sdutlinux.org/
http://pypi.mirrors.ustc.edu.cn/

下载依赖包:https://pypi.org/project
pip install -i https://pypi.douban.com/simple/ scrapy
pip install -i https://pypi.douban.com/simple/ wheel
pip install -i https://pypi.douban.com/simple/ Pillow
pip install -i https://pypi.douban.com/simple/ requests
pip install -i https://pypi.douban.com/simple/ tesserocr
pip install -i https://pypi.douban.com/simple/ virtualenv
pip install -i https://pypi.douban.com/simple/ -r D:\project\topoda\cm_notices\requirement.txt
pip install -i https://pypi.douban.com/simple/ -r /home/topoda/cm_notices/requirement.txt
pip install -i https://pypi.douban.com/simple/ pandas
pip install -i https://pypi.douban.com/simple/ opencv-python
pip install -i https://pypi.douban.com/simple/ bs4
pip install -i https://pypi.douban.com/simple/ elasticsearch

升级：
pip install -i https://pypi.douban.com/simple/ --upgrade tensorflow