Bump pyparsing from 2.3.0 to 2.3.1

[dependabot-preview]

Bumps pyparsing from 2.3.0 to 2.3.1.

Release notes

Sourced from pyparsing's releases.

Pyparsing 2.3.1

New features in Pyparsing 2.3.1 -

• ParseException.explain() method, to convert a raw Python traceback into a list of the parse expressions leading up to a parse mismatch.

• New unicode sets Latin-A and Latin-B, and the ability to define custom sets using multiple inheritance.

    class Turkish_set(pp.pyparsing_unicode.Latin1, pp.pyparsing_unicode.LatinA):
        pass
  
    turkish_word = pp.Word(Turkish_set.alphas)
  

• State machine examples, showing how to extend Python with your own pyparsing-enabled syntax. The examples implement a 'statemachine' keyword to define a set of classes and transition attribute to implement a State pattern:

    statemachine TrafficLightState:
        Red -> Green
        Green -> Yellow
        Yellow -> Red
  

  Transitions can be named also:

    statemachine LibraryBookState:
        New -(shelve)-> Available
        Available -(reserve)-> OnHold
        OnHold -(release)-> Available
        Available -(checkout)-> CheckedOut
        CheckedOut -(checkin)-> Available
  

• Example parser for decaf language. This language is commonly used in university CS compiler classes.

• Fixup of docstrings to Sphinx format, so pyparsing docs are now available on readthedocs.com! (https://pyparsing-docs.readthedocs.io/en/latest/)

Changelog

Sourced from pyparsing's changelog.

Version 2.3.1 - January, 2019

• POSSIBLE API CHANGE: this release fixes a bug when results names were
  attached to a MatchFirst or Or object containing an And object.
  Previously, a results name on an And object within an enclosing MatchFirst
  or Or could return just the first token in the And. Now, all the tokens
  matched by the And are correctly returned. This may result in subtle
  changes in the tokens returned if you have this condition in your pyparsing
  scripts.

• New staticmethod ParseException.explain() to help diagnose parse exceptions
  by showing the failing input line and the trace of ParserElements in
  the parser leading up to the exception. explain() returns a multiline
  string listing each element by name. (This is still an experimental
  method, and the method signature and format of the returned string may
  evolve over the next few releases.)

  Example:
  # define a parser to parse an integer followed by an
  # alphabetic word
  expr = pp.Word(pp.nums).setName("int")
  + pp.Word(pp.alphas).setName("word")
  try:
  # parse a string with a numeric second value instead of alpha
  expr.parseString("123 355")
  except pp.ParseException as pe:
  print_(pp.ParseException.explain(pe))

  Prints:
  123 355
  ^
  ParseException: Expected word (at char 4), (line:1, col:5)
  main.ExplainExceptionTest
  pyparsing.And - {int word}
  pyparsing.Word - word

  explain() will accept any exception type and will list the function
  names and parse expressions in the stack trace. This is especially
  useful when an exception is raised in a parse action.

  Note: explain() is only supported under Python 3.

• Fix bug in dictOf which could match an empty sequence, making it
  infinitely loop if wrapped in a OneOrMore.

• Added unicode sets to pyparsing_unicode for Latin-A and Latin-B ranges.

• Added ability to define custom unicode sets as combinations of other sets
  using multiple inheritance.

... (truncated)

Commits

• 349637f Merge pull request #64 from mcepl/denose
• afddc54 Add note that explain() is only supported under Python 3.
• b600b54 Disable explain() tests if running in Py2
• 17aeb19 Modify explain() for Py2 compat
• d626c99 Add enumerated place holders for strings that invoke str.format(), for Py2 co...
• e9ef507 Add enumerated place holders for strings that invoke str.format(), for Py2 co...
• bf348d6 Update CHANGES to include note on fixing issue #65; generalized the note abou...
• 898a4b8 Unit test to test fix for issue #65
• e29bb65 Fix inconsistency between Keyword(caseless=True) and CaselessKeyword (issue #65)
• fb23d63 Remove dependency on nose
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #126.