My initial comment was going to be that "The Python CSV library is only 448 lines (378 LOC) [1]".

Only later did I realize that the bulk of the work is done by the C library, which is ~1500 LOC [2].

I guess parsing CSVs reliably is a reasonably difficult undertaking.

[1] https://github.com/python/cpython/blob/3.8/Lib/csv.py [2] https://github.com/python/cpython/blob/4a21e57fe55076c77b0ee...