NOTE: In the future release 3.2.0, use of many of the pre-PEP8 methods (such as ParserElement.parseString) will start to raise DeprecationWarnings. 3.2.0 should get released some time later in 2023. I currently plan to completely drop the pre-PEP8 methods in pyparsing 4.0, though we won't see that release until at least late 2023 if not 2024. So there is plenty of time to convert existing parsers to the new function names before the old functions are completely removed. (Big help from Devin J. Pohly in structuring the code to enable this peaceful transition.)
Version 3.2.0 will also discontinue support for Python versions 3.6 and 3.7.
API ENHANCEMENT: Optional(expr) may now be written as expr | ""
This will make this code:
"{" + Optional(Literal("A") | Literal("a")) + "}"
writable as:
"{" + (Literal("A") | Literal("a") | "") + "}"
Some related changes implemented as part of this work:
Literal("") now internally generates an Empty() (and no longer raises an exception)
Empty is now a subclass of Literal
Suggested by Antony Lee (issue #412), PR (#413) by Devin J. Pohly.
Added new class property identifier to all Unicode set classes in pyparsing.unicode, using the class's values for cls.identchars and cls.identbodychars. Now Unicode-aware parsers that formerly wrote:
ident = ppu.Greek.identifier
# or
# ident = ppu.Ελληνικά.identifier
Reworked delimited_list function into the new DelimitedList class. DelimitedList has the same constructor interface as delimited_list, and in this release, delimited_list changes from a function to a synonym for DelimitedList. delimited_list and the older delimitedList method will be deprecated in a future release, in favor of DelimitedList.
Added new class method ParserElement.using_each, to simplify code that creates a sequence of Literals, Keywords, or other ParserElement subclasses.
For instance, to define suppressable punctuation, you would previously write:
using_each will also accept optional keyword args, which it will pass through to the class initializer. Here is an expression for single-letter variable names that might be used in an algebraic expression:
Fixed regression in Word(min), reported by Ricardo Coccioli, good catch! (Issue #502)
Fixed bug in bad exception messages raised by Forward expressions. PR submitted
by Kyle Sunden, thanks for your patience and collaboration on this (#493).
Fixed regression in SkipTo, where ignored expressions were not checked when looking
for the target expression. Reported by catcombo, Issue #500.
Fixed type annotation for enable_packrat, PR submitted by Mike Urbach, thanks! (Issue #498)
Some general internal code cleanup. (Instigated by Michal Čihař, Issue #488)
Version 3.1.0 - June, 2023
Added tag_emitter.py to examples. This example demonstrates how to insert
tags into your parsed results that are not part of the original parsed text.
Version 3.1.0b2 - May, 2023
Updated create_diagram() code to be compatible with railroad-diagrams package
version 3.0. Fixes Issue #477 (railroad diagrams generated with black bars),
reported by Sam Morley-Short.
Fixed bug in NotAny, where parse actions on the negated expr were not being run.
This could cause NotAny to incorrectly fail if the expr would normally match,
but would fail to match if a condition used as a parse action returned False.
Fixes Issue #482, raised by byaka, thank you!
Fixed create_diagram() to accept keyword args, to be passed through to the
template.render() method to generate the output HTML (PR submitted by Aussie Schnore,
good catch!)
Fixed bug in python_quoted_string regex.
Added examples/bf.py Brainf*ck parser/executor example. Illustrates using
a pyparsing grammar to parse language syntax, and attach executable AST nodes to
the parsed results.
Version 3.1.0b1 - April, 2023
Added support for Python 3.12.
API CHANGE: A slight change has been implemented when unquoting a quoted string
parsed using the QuotedString class. Formerly, when unquoting and processing
whitespace markers such as \t and \n, these substitutions would occur first, and
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Bumps the python-packages group with 2 updates: matplotlib and pyparsing.
Updates
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Sourced from matplotlib's releases.
Commits
dd46f66REL: v3.7.34622a97DOC: Update GitHub stats for 3.7.3d451a8eMerge pull request #26725 from meeseeksmachine/auto-backport-of-pr-26719-on-v...2e1ad11Merge pull request #26723 from meeseeksmachine/auto-backport-of-pr-26721-on-v...2d9ea85Backport PR #26719: Fix issue with missing attribute in Path3DCollectionce598a6Backport PR #26721: Add a Python 3.12 classifier6e53543Merge pull request #26672 from QuLogic/cibw-backporte2a3029Merge pull request #26706 from QuLogic/pin-numpy67b15abPin NumPy below v2 for 3.7.x8bd2b1eUse NumPy 1.25 for PyPy 3.9 wheel buildsUpdates
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Commits
c09eb6eMinor update to HowToUsePyparsing.rst395431aPrep for release54b39a5Fix regression in SkipTo when ignoring an ignoreExpr, and failed to also igno...411c8abHandle case where Word(min > 1) with differing init and body chars1936b36Handle case where Word(min > 1) (fixes #502)421e0fcUpdate timestamp and CHANGES file to reflect recent PRs; added another test t...1355e76Merge branch 'pyparsing_3.1.x'173bc16Merge pull request #4935b939ccUse reset_pyparsing_context for each example in test_examples.pyeb9db9eAdd common, unicode, and testing to allDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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