ImportError: cannot import name ‘Literal‘ from ‘pyparsing‘ (unknown location)

今天用python导入matplotlib模块居然报错ImportError: cannot import name 'Literal' from 'pyparsing' (unknown location)，

打开site_pakages里面的pyparsing一看，发现里面的文件居然都是空的，于是果断

pip uninstall pyparsing

pip install pyparsing

完美解决，就这么简单。