Repository navigation
Deprecation warnings from pyparsing library #502
Description
Describe the bug
As of v3.3.0 (Dec 2025), the pyparsing library has begun emitting DeprecationWarnings for use of non-PEP8-compliant method aliases. These are triggered by bibtexparser.
Reproducing
Version: 1.4.3
Code:
import warnings
warnings.simplefilter("always", DeprecationWarning)
import bibtexparser
bibtexparser.bparser.BibTexParser()Bibtex:
No bibtex required
Workaround
Suppress DeprecationWarnings from the bibtexparser and pyparsing modules. Brute force approach not tailored to the specific warnings:
warnings.filterwarnings("ignore", category=DeprecationWarning, module="bibtexparser")
warnings.filterwarnings("ignore", category=DeprecationWarning, module="pyparsing")Remaining Questions (Optional)
Please tick all that apply:
- I would be willing to contribute a PR to fix this issue.
- This issue is a blocker, I'd be grateful for an early fix.
Activity
MiWeiss commentedon Jan 14, 2026
Hi @jennifer-richards .
Thanks for offering to contribute a PR. I am looking forward to reviewing it.
Attention: This issue refers to
bibtexparser v1(which lives on a separate branch, not the main branch - check the README)jennifer-richards commentedon Jan 15, 2026
Question for the pr: is nudging the pyparsing dependency up to 3.0 from its current 2.0 (or so) acceptable, or is it necessary to maintain support for the older library? The now-deprecated aliases were added in 3.0, so it'll be a more complex patch to support both.
[-]Deprecation warnings from pyparser library[/-][+]Deprecation warnings from pyparsing library[/+]MiWeiss commentedon Jan 15, 2026
Yep, I don't see any problem there. Current constaint sais 'pyparsing>=2.0.3', so most users will be on 3.x anyways, and compatibility should also be given.
MiWeiss commentedon Jan 29, 2026
Clodes in #512, and released in 1.4.4. Thanks @jennifer-richards