History and release notes

2.2 - 2025-09-12

• Dropped support for Python 3.7, 3.8 which are past EOL

• Various docs and type hint updates

2.1 - 2023-02-22

• Dropped support for Python 3.7

• Test against Python 3.11

• Added docstrings and basic type hints to all primitives and main methods

2.0 - 2022-09-08

• Dropped support for Python < 3.6

• Added Parser.until(). Thanks @mcdeoliveira!

• Parser.optional() now supports an optional default argument to be returned instead of None.

1.4.0 - 2021-11-15

• Documentation improvements.

• Added group parameter to regex() - thanks @camerondm9.

• Support bytes with regex() as well as str - thanks @quack4.

• Added forward_declaration.

1.3.0 - 2019-08-03

• Documentation improvements.

• Added peek() - thanks @lisael.

• Removed Python 3.3 support

• Added Python 3.7 support

• Parser.combine_dict() now strips keys that start with _.

1.2.0 - 2017-11-15

• Added transform argument to string() and string_from().

• Made Parser.combine_dict() accept lists of name value pairs, and filter out keys with value None.

• Added from_enum().

1.1.0 - 2017-11-05

• Added Parser.optional().

• Added Parser.tag().

• Added seq() keyword argument version (Python 3.6)

• Added Parser.combine_dict().

• Documented Parser.mark().

• Documentation improvements.

1.0.0 - 2017-10-10

• Improved parse failure messages of @generate parsers. Previously the parser was given a default description of the function name, which hides all useful internal info there might be.

• Added Parser.sep_by()

• Added test_char()

• Added char_from()

• Added string_from()

• Added any_char

• Added decimal_digit

• Added Parser.concat()

• Fixed parsy so that it can again work with tokens as well as strings, allowing it to be used as both a lexer or parser or both, with docs and tests.

• Added test_item()

• Added match_item()

• Added Parser.should_fail()

0.9.0 - 2017-09-28

• Better error reporting of failed parses.

• Documentation overhaul and expansion.

• Added Parser.combine().

0.0.4 - 2014-12-28

• See git logs for changes before this point.