pip install parsimonious==0.8.1

(Soon to be) the fastest pure-Python PEG parser I could muster

Source
Among top 1% packages on PyPI.
Over 1.1M downloads in the last 90 days.

Commonly used with parsimonious

Based on how often these packages appear together in public requirements.txt files on GitHub.

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Version usage of parsimonious

Proportion of downloaded versions in the last 3 months (only versions over 1%).

0.8.1

91.02%

0.7.0

5.63%

0.8.0

2.76%