On 4/1/2019 1:14 AM, Guido van Rossum wrote:
We do have a parser generator in the standard library: https://github.com/python/cpython/tree/master/Lib/lib2to3/pgen2
It is effectively undocumented and by inference discouraged from use. The entry for lib2to3 in the 2to3 doc: https://docs.python.org/3/library/2to3.html#module-lib2to3 " lib2to3 - 2to3’s library Source code: Lib/lib2to3/ Note: The lib2to3 API should be considered unstable and may change drastically in the future. help(pgen) is not much more helpful. : Help on package lib2to3.pgen2 in lib2to3: NAME lib2to3.pgen2 - The pgen2 package. PACKAGE CONTENTS conv driver grammar literals parse pgen token tokenize FILE c:\programs\python38\lib\lib2to3\pgen2\__init__.py -- Terry Jan Reedy