error: Microsoft Visual C++ 9.0 is required (Unable to find vcvarsall.bat)

报错信息：

error: Microsoft Visual C++ 9.0 is required (Unable to find vcvarsall.bat). Get it from http://aka.ms/vcpython27

环境：

window 10

python 2.7.12 安装时报错

pip install wordcloud

解决方法：

python2.7中缺少VC9.0的编译包，安装Micorsoft Visual C++ Compiler for Python 2.7 即可

微软官方下载地址：https://www.microsoft.com/en-us/download/details.aspx?id=44266

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