Sourced frompyparsing's changelog.

Version 3.3.1 - December, 2025

• Added license info to metadata, following PEP-639. Thanks to Gedalia Pasternak andMarc Mueller for submitted issue and PR. Fixes#626.

Version 3.3.0 - December, 2025

===========================================================================================The version 3.3.0 release will begin emittingDeprecationWarnings for pyparsing methodsthat have been renamed to PEP8-compliant names (introduced in pyparsing 3.0.0, in August,2021, with legacy names retained as aliases). In preparation, I added in pyparsing3.2.2 a utility for finding and replacing the legacy method names with the new names.This utility is located atpyparsing/tools/cvt_pep8_names.py. This script will scan allPython files specified on the command line, and if the-u option is selected, willreplace all occurrences of the old method names with the new PEP8-compliant names,updating the files in place.

Here is an example that converts all the files in the pyparsing/examples directory:

  python -m pyparsing.tools.cvt_pyparsing_pep8_names -u examples/*.py

The new names are compatible with pyparsing versions 3.0.0 and later.

• DeprecatedindentedBlock, when converted using thecvt_pyparsing_pep8_namesutility, will emitUserWarnings that additional code changes will be required.This is because the newIndentedBlock class no longer requires the calling codeto supply an indent stack, while adding support for nested indentation levelsand grouping.

• DeprecatedlocatedExpr, when converted using thecvt_pyparsing_pep8_namesutility, will emitUserWarnings that additional code changes may be required.The newLocated class removes the extra grouping level of the parsed values.(If the originallocatedExpr parser was defined with a results name, thenthe extra grouping is retained, so that the results name nesting works properly;in this case, no code changes would be required.)

• Updated all examples and test cases to use PEP8 names (unless the test case is specificallydesigned to test behavior of a legacy method). Added railroad diagrams for some examples.

• Added exception handling when callingformatted_message(), so thatstr(exception)always returns at leastsomething.

• All unit tests pass with Python 3.14, including 3.14t. This doesnot necessarilymean that pyparsing is now thread-safe, just that when run in the free-threadedinterpreter, there were no errors. None of the unit tests try to do any parsingwith multiple threads - they test the basic functionality of the library, under variousversions of packrat and left-recursive parsing.

... (truncated)

• d73ce7a Update CHANGES file to reflect PR 627
• 1089724 Mark for 3.3.1 dev/release
• 421d20a Update license metadata to follow PEP 639
• e4895d3 Reduced recursive grammar in tiny_parser.py to avoid
• b6b0111 Blackening before releasing
• 7fbbcbd Revert transform_string perf penalty in _flatten (introduced in 3.2.0b2)
• 336647a Update perf scripts to run additional 3.2.x releases
• 6413afc Prep for 3.3.0 release
• 9223660 Added copyright line to LICENSE file
• 92d8368 Remove obsolete comment
• Additional commits viewable incompare view

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)