pyparsing 3.2.0b2

pyparsing 3.2.0b2

on Python PyPI

Added type annotations to remainder of pyparsing package, and added mypy run to tox.ini, so that type annotations are now run as part of pyparsing's CI. Addresses Issue #373, raised by Iwan Aucamp, thanks!

Exception message format can now be customized, by overriding ParseBaseException.format_message:

def custom_exception_message(exc) -> str:
    found_phrase = f", found {exc.found}" if exc.found else ""
    return f"{exc.lineno}:{exc.column} {exc.msg}{found_phrase}"

ParseBaseException.formatted_message = custom_exception_message

(PR #571 submitted by Odysseyas Krystalakos, nice work!)

POSSIBLE BREAKING CHANGE: Fixed bug in transform_string() where whitespace in the input string was not properly preserved in the output string.

If your code uses transform_string, this bugfix may require changes in your code.

Fixed railroad diagrams that get generated with a parser containing a Regex element defined using a verbose pattern - the pattern gets flattened and comments removed before creating the corresponding diagram element.

Defined a more performant regular expression used internally by common_html_entity.

Regex instances can now be created using a callable that takes no arguments and just returns a string or a compiled regular expression, so that creating complex regular expression patterns can be deferred until they are actually used for the first time in the parser.

Added optional flatten Boolean argument to ParseResults.as_list(), to return the parsed values in a flattened list.