ImportError: cannot import name ‘Opt‘ from ‘pyparsing‘

最近在运行一个vlep程序的时候，出现了下面的错误：

Traceback (most recent call last):
  File "vlep_main.py", line 16, in <module>
    from model.VlepModel import VlepModel
  File "....../model/VlepModel.py", line 3, in <module>
    from pyparsing import Opt
ImportError: cannot import name 'Opt' from 'pyparsing' (/home/eric/anaconda3/envs/wsd/lib/python3.8/site-packages/pyparsing.py)

解决方法

pyparsing的版本太低了，默认的是2.4，需要升级以下。

pip install pyparsing==3.0.9