出现这种错误的原因就是未安装VC++ build tools2015，下载安装即可
| Python Version | You will need |
|---|---|
| 3.5 and later | Update: Install Visual Studio 2017, select the Python development workload and the Native development tools option. Visual C++ Build Tools 2015 or Visual Studio 2015 |
| 3.3 and 3.4 | Windows SDK for Windows 7 and .NET 4.0 (Alternatively, Visual Studio 2010 if you have access to it) |
| 2.6 to 3.2 | Microsoft Visual C++ Compiler for Python 2.7 |
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