pip3 install pycrypto问题处理

python3 下面安装pycrypto时，出现

    copying lib\Crypto\Signature\PKCS1_v1_5.py -> build\lib.win-amd64-3.7\Crypto\Signature
    copying lib\Crypto\Signature\__init__.py -> build\lib.win-amd64-3.7\Crypto\Signature
    Skipping optional fixer: buffer
    Skipping optional fixer: idioms
    Skipping optional fixer: set_literal
    Skipping optional fixer: ws_comma
    running build_ext
    warning: GMP or MPIR library not found; Not building Crypto.PublicKey._fastmath.
    building 'Crypto.Random.OSRNG.winrandom' extension
    error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": https://visualstudio.microsoft.com/downloads/

1、安装了VC++ 14.0 https://www.microsoft.com/zh-cn/download/confirmation.aspx?id=48145

依然不行

2、从https://pypi.org/project/pycrypto/2.4.1/#files 下载了pycrypto  ，直接pip install setup.py，

依然不行

3、最后安装V2XE上的说法，成功解决：

pip install pycryptodome

Visual Studio 2013 —> 12
Visual Studio 2015 —> 14
Visual Studio 2017 —> 15