Just after installing PIP in Windows environment on the machine, it is convenient to use it when installing the package in the future. Who knows that when using pip to install asyncio for the first time, it will report an error

when using PIP installation package under windows7x64, you will be prompted to report an error: Microsoft Visual C + + 9.0 is required (unable to find vcfarsall. Bat)

environment: windows7 x64, python2.7, vs2012

reason: when using PIP installation package under windows, you need VS2008 installed on the machine, but vs2012 is not enough, if you don’t want to install VS2008, You can install a package of Micorsoft Visual C + + compiler for Python 2.7