安装命令：

    1. pip install -i 
    2. http://mirrors.aliyun.com/pypi/simple/ --trusted-host 
    3. mirrors.aliyun.com pywin32
    4. pip install -i 
    5. http://mirrors.aliyun.com/pypi/simple/ --trusted-host 
    6. mirrors.aliyun.com flask
    1. pip install requests