Update pyparsing to 3.0.0

[pyup-bot]

This PR updates pyparsing from 2.4.7 to 3.0.0.

Changelog

3.0.0

---------------
- A consolidated list of all the changes in the 3.0.0 release can be found in
docs/whats_new_in_3_0_0.rst.
(https://github.com/pyparsing/pyparsing/blob/master/docs/whats_new_in_3_0_0.rst)


Version 3.0.0.final -
---------------------
- Added support for python -W warning option to call enable_all_warnings() at startup.
Also detects setting of PYPARSINGENABLEALLWARNINGS environment variable to any non-blank
value.

- Fixed named results returned by `url` to match fields as they would be parsed
using urllib.parse.urlparse.

- Early response to `with_line_numbers` was positive, with some requested enhancements:
. added a trailing "|" at the end of each line (to show presence of trailing spaces);
 can be customized using `eol_mark` argument
. added expand_tabs argument, to control calling str.expandtabs (defaults to True
 to match parseString)
. added mark_spaces argument to support display of a printing character in place of
 spaces, or Unicode symbols for space and tab characters
. added mark_control argument to support highlighting of control characters using
 '.' or Unicode symbols, such as "␍" and "␊".

- Modified helpers common_html_entity and replace_html_entity() to use the HTML
entity definitions from html.entities.html5.

- Updated the class diagram in the pyparsing docs directory, along with the supporting
.puml file (PlantUML markup) used to create the diagram.

- Added global method `autoname_elements()` to call `set_name()` on all locally
defined `ParserElements` that haven't been explicitly named using `set_name()`, using
their local variable name. Useful for setting names on multiple elements when
creating a railroad diagram.

         a = pp.Literal("a")
         b = pp.Literal("b").set_name("bbb")
         pp.autoname_elements()

`a` will get named "a", while `b` will keep its name "bbb".

3.0.0rc2

------------------
- Added `url` expression to `pyparsing_common`. (Sample code posted by Wolfgang Fahl,
very nice!)

This new expression has been added to the `urlExtractorNew.py` example, to show how
it extracts URL fields into separate results names.

- Added method to `pyparsing_test` to help debugging, `with_line_numbers`.
Returns a string with line and column numbers corresponding to values shown
when parsing with expr.set_debug():

   data = """\
      A
         100"""
   expr = pp.Word(pp.alphanums).set_name("word").set_debug()
   print(ppt.with_line_numbers(data))
   expr[...].parseString(data)

prints:

             1
    1234567890
  1:   A
  2:      100
 Match word at loc 3(1,4)
      A
      ^
 Matched word -> ['A']
 Match word at loc 11(2,7)
         100
         ^
 Matched word -> ['100']

- Added new example `cuneiform_python.py` to demonstrate creating a new Unicode
range, and writing a Cuneiform->Python transformer (inspired by zhpy).

- Fixed issue 272, reported by PhasecoreX, when LineStart() expressions would match
input text that was not necessarily at the beginning of a line.

As part of this fix, two new classes have been added: AtLineStart and AtStringStart.
The following expressions are equivalent:

   LineStart() + expr      and     AtLineStart(expr)
   StringStart() + expr    and     AtStringStart(expr)

- Fixed ParseFatalExceptions failing to override normal exceptions or expression
matches in MatchFirst expressions. Addresses issue 251, reported by zyp-rgb.

- Fixed bug in which ParseResults replaces a collection type value with an invalid
type annotation (as a result of changed behavior in Python 3.9). Addresses issue 276, reported by
Rob Shuler, thanks.

- Fixed bug in ParseResults when calling `__getattr__` for special double-underscored
methods. Now raises AttributeError for non-existent results when accessing a
name starting with '__'. Addresses issue 208, reported by Joachim Metz.

- Modified debug fail messages to include the expression name to make it easier to sync
up match vs success/fail debug messages.

3.0.0rc1

----------------------------------
- Railroad diagrams have been reformatted:
. creating diagrams is easier - call

     expr.create_diagram("diagram_output.html")

 create_diagram() takes 3 arguments:
 . the filename to write the diagram HTML
 . optional 'vertical' argument, to specify the minimum number of items in a path
   to be shown vertically; default=3
 . optional 'show_results_names' argument, to specify whether results name
   annotations should be shown; default=False
. every expression that gets a name using setName() gets separated out as
 a separate subdiagram
. results names can be shown as annotations to diagram items
. Each, FollowedBy, and PrecededBy elements get [ALL], [LOOKAHEAD], and [LOOKBEHIND]
 annotations
. removed annotations for Suppress elements
. some diagram cleanup when a grammar contains Forward elements
. check out the examples make_diagram.py and railroad_diagram_demo.py

- Type annotations have been added to most public API methods and classes.

- Better exception messages to show full word where an exception occurred.

   Word(alphas, alphanums)[...].parseString("ab1 123", parseAll=True)

Was:
   pyparsing.ParseException: Expected end of text, found '1'  (at char 4), (line:1, col:5)
Now:
   pyparsing.exceptions.ParseException: Expected end of text, found '123'  (at char 4), (line:1, col:5)

- Suppress can be used to suppress text skipped using "...".

  source = "lead in START relevant text END trailing text"
  start_marker = Keyword("START")
  end_marker = Keyword("END")
  find_body = Suppress(...) + start_marker + ... + end_marker
  print(find_body.parseString(source).dump())

Prints:

   ['START', 'relevant text ', 'END']
   - _skipped: ['relevant text ']

- New string constants `identchars` and `identbodychars` to help in defining identifier Word expressions

Two new module-level strings have been added to help when defining identifiers, `identchars` and `identbodychars`.

Instead of writing::

   import pyparsing as pp
   identifier = pp.Word(pp.alphas + "_", pp.alphanums + "_")

you will be able to write::

   identifier = pp.Word(pp.identchars, pp.identbodychars)

Those constants have also been added to all the Unicode string classes::

   import pyparsing as pp
   ppu = pp.pyparsing_unicode

   cjk_identifier = pp.Word(ppu.CJK.identchars, ppu.CJK.identbodychars)
   greek_identifier = pp.Word(ppu.Greek.identchars, ppu.Greek.identbodychars)

- Added a caseless parameter to the `CloseMatch` class to allow for casing to be
ignored when checking for close matches. (Issue 281) (PR by Adrian Edwards, thanks!)

- Fixed bug in Located class when used with a results name. (Issue 294)

- Fixed bug in QuotedString class when the escaped quote string is not a
repeated character. (Issue 263)

- parseFile() and create_diagram() methods now will accept pathlib.Path
arguments.

3.0.0b3

------------------------------
- PEP-8 compatible names are being introduced in pyparsing version 3.0!
All methods such as `parseString` have been replaced with the PEP-8
compliant name `parse_string`. In addition, arguments such as `parseAll`
have been renamed to `parse_all`. For backward-compatibility, synonyms for
all renamed methods and arguments have been added, so that existing
pyparsing parsers will not break. These synonyms will be removed in a future
release.

In addition, the Optional class has been renamed to Opt, since it clashes
with the common typing.Optional type specifier that is used in the Python
type annotations. A compatibility synonym is defined for now, but will be
removed in a future release.

- HUGE NEW FEATURE - Support for left-recursive parsers!
Following the method used in Python's PEG parser, pyparsing now supports
left-recursive parsers when left recursion is enabled.

     import pyparsing as pp
     pp.ParserElement.enable_left_recursion()

      a common left-recursion definition
      define a list of items as 'list + item | item'
      BNF:
        item_list := item_list item | item
        item := word of alphas
     item_list = pp.Forward()
     item = pp.Word(pp.alphas)
     item_list <<= item_list + item | item

     item_list.run_tests("""\
         To parse or not to parse that is the question
         """)
Prints:

     ['To', 'parse', 'or', 'not', 'to', 'parse', 'that', 'is', 'the', 'question']

Great work contributed by Max Fischer!

- `delimited_list` now supports an additional flag `allow_trailing_delim`,
to optionally parse an additional delimiter at the end of the list.
Contributed by Kazantcev Andrey, thanks!

- Removed internal comparison of results values against b"", which
raised a BytesWarning when run with `python -bb`. Fixes issue 271 reported
by Florian Bruhin, thank you!

- Fixed STUDENTS table in sql2dot.py example, fixes issue 261 reported by
legrandlegrand - much better.

- Python 3.5 will not be supported in the pyparsing 3 releases. This will allow
for future pyparsing releases to add parameter type annotations, and to take
advantage of dict key ordering in internal results name tracking.

3.0.0b2

--------------------------------
- API CHANGE
`locatedExpr` is being replaced by the class `Located`. `Located` has the same
constructor interface as `locatedExpr`, but fixes bugs in the returned
`ParseResults` when the searched expression contains multiple tokens, or
has internal results names.

`locatedExpr` is deprecated, and will be removed in a future release.

3.0.0b1

--------------------------------
- API CHANGE
Diagnostic flags have been moved to an enum, `pyparsing.Diagnostics`, and
they are enabled through module-level methods:
- `pyparsing.enable_diag()`
- `pyparsing.disable_diag()`
- `pyparsing.enable_all_warnings()`

- API CHANGE
Most previous `SyntaxWarnings` that were warned when using pyparsing
classes incorrectly have been converted to `TypeError` and `ValueError` exceptions,
consistent with Python calling conventions. All warnings warned by diagnostic
flags have been converted from `SyntaxWarnings` to `UserWarnings`.

- To support parsers that are intended to generate native Python collection
types such as lists and dicts, the `Group` and `Dict` classes now accept an
additional boolean keyword argument `aslist` and `asdict` respectively. See
the `jsonParser.py` example in the `pyparsing/examples` source directory for
how to return types as `ParseResults` and as Python collection types, and the
distinctions in working with the different types.

In addition parse actions that must return a value of list type (which would
normally be converted internally to a ParseResults) can override this default
behavior by returning their list wrapped in the new `ParseResults.List` class:

    this parse action tries to return a list, but pyparsing
    will convert to a ParseResults
   def return_as_list_but_still_get_parse_results(tokens):
       return tokens.asList()

    this parse action returns the tokens as a list, and pyparsing will
    maintain its list type in the final parsing results
   def return_as_list(tokens):
       return ParseResults.List(tokens.asList())

This is the mechanism used internally by the `Group` class when defined
using `aslist=True`.

- A new `IndentedBlock` class is introduced, to eventually replace the
current `indentedBlock` helper method. The interface is largely the same,
however, the new class manages its own internal indentation stack, so
it is no longer necessary to maintain an external `indentStack` variable.

- API CHANGE
Added `cache_hit` keyword argument to debug actions. Previously, if packrat
parsing was enabled, the debug methods were not called in the event of cache
hits. Now these methods will be called, with an added argument
`cache_hit=True`.

If you are using packrat parsing and enable debug on expressions using a
custom debug method, you can add the `cache_hit=False` keyword argument,
and your method will be called on packrat cache hits. If you choose not
to add this keyword argument, the debug methods will fail silently,
behaving as they did previously.

- When using `setDebug` with packrat parsing enabled, packrat cache hits will
now be included in the output, shown with a leading '*'. (Previously, cache
hits and responses were not included in debug output.) For those using custom
debug actions, see the previous item regarding an optional API change
for those methods.

- `setDebug` output will also show more details about what expression
is about to be parsed (the current line of text being parsed, and
the current parse position):

     Match integer at loc 0(1,1)
       1 2 3
       ^
     Matched integer -> ['1']

The current debug location will also be indicated after whitespace
has been skipped (was previously inconsistent, reported in Issue 244,
by Frank Goyens, thanks!).

- Modified the repr() output for `ParseResults` to include the class
name as part of the output. This is to clarify for new pyparsing users
who misread the repr output as a tuple of a list and a dict. pyparsing
results will now read like:

   ParseResults(['abc', 'def'], {'qty': 100}]

instead of just:

   (['abc', 'def'], {'qty': 100}]

- Fixed bugs in Each when passed OneOrMore or ZeroOrMore expressions:
. first expression match could be enclosed in an extra nesting level
. out-of-order expressions now handled correctly if mixed with required
 expressions
. results names are maintained correctly for these expressions

- Fixed traceback trimming, and added `ParserElement.verbose_traceback`
save/restore to `reset_pyparsing_context()`.

- Default string for `Word` expressions now also include indications of
`min` and `max` length specification, if applicable, similar to regex length
specifications:

     Word(alphas)             -> "W:(A-Za-z)"
     Word(nums)               -> "W:(0-9)"
     Word(nums, exact=3)      -> "W:(0-9){3}"
     Word(nums, min=2)        -> "W:(0-9){2,...}"
     Word(nums, max=3)        -> "W:(0-9){1,3}"
     Word(nums, min=2, max=3) -> "W:(0-9){2,3}"

For expressions of the `Char` class (similar to `Word(..., exact=1)`, the expression
is simply the character range in parentheses:

     Char(nums)               -> "(0-9)"
     Char(alphas)             -> "(A-Za-z)"

- Removed `copy()` override in `Keyword` class which did not preserve definition
of ident chars from the original expression. PR 233 submitted by jgrey4296,
thanks!

- In addition to `pyparsing.__version__`, there is now also a `pyparsing.__version_info__`,
following the same structure and field names as in `sys.version_info`.

3.0.0a2

----------------------------
- Summary of changes for 3.0.0 can be found in "What's New in Pyparsing 3.0.0"
documentation.

- API CHANGE
Changed result returned when parsing using countedArray,
the array items are no longer returned in a doubly-nested
list.

- An excellent new enhancement is the new railroad diagram
generator for documenting pyparsing parsers:

     import pyparsing as pp
     from pyparsing.diagram import to_railroad, railroad_to_html
     from pathlib import Path

      define a simple grammar for parsing street addresses such
      as "123 Main Street"
          number word...
     number = pp.Word(pp.nums).setName("number")
     name = pp.Word(pp.alphas).setName("word")[1, ...]

     parser = number("house_number") + name("street")
     parser.setName("street address")

      construct railroad track diagram for this parser and
      save as HTML
     rr = to_railroad(parser)
     Path('parser_rr_diag.html').write_text(railroad_to_html(rr))

Very nice work provided by Michael Milton, thanks a ton!

- Enhanced default strings created for Word expressions, now showing
string ranges if possible. `Word(alphas)` would formerly
print as `W:(ABCD...)`, now prints as `W:(A-Za-z)`.

- Added ignoreWhitespace(recurse:bool = True) and added a
recurse argument to leaveWhitespace, both added to provide finer
control over pyparsing's whitespace skipping. Also contributed
by Michael Milton.

- The unicode range definitions for the various languages were
recalculated by interrogating the unicodedata module by character
name, selecting characters that contained that language in their
Unicode name. (Issue 227)

Also, pyparsing_unicode.Korean was renamed to Hangul (Korean
is also defined as a synonym for compatibility).

- Enhanced ParseResults dump() to show both results names and list
subitems. Fixes bug where adding a results name would hide
lower-level structures in the ParseResults.

- Added new __diag__ warnings:

 "warn_on_parse_using_empty_Forward" - warns that a Forward
 has been included in a grammar, but no expression was
 attached to it using '<<=' or '<<'

 "warn_on_assignment_to_Forward" - warns that a Forward has
 been created, but was probably later overwritten by
 erroneously using '=' instead of '<<=' (this is a common
 mistake when using Forwards)
 (**currently not working on PyPy**)

- Added ParserElement.recurse() method to make it simpler for
grammar utilities to navigate through the tree of expressions in
a pyparsing grammar.

- Fixed bug in ParseResults repr() which showed all matching
entries for a results name, even if listAllMatches was set
to False when creating the ParseResults originally. Reported
by Nicholas42 on GitHub, good catch! (Issue 205)

- Modified refactored modules to use relative imports, as
pointed out by setuptools project member jaraco, thank you!

- Off-by-one bug found in the roman_numerals.py example, a bug
that has been there for about 14 years! PR submitted by
Jay Pedersen, nice catch!

- A simplified Lua parser has been added to the examples
(lua_parser.py).

- Added make_diagram.py to the examples directory to demonstrate
creation of railroad diagrams for selected pyparsing examples.
Also restructured some examples to make their parsers importable
without running their embedded tests.

3.0.0a1

-----------------------------
- Removed Py2.x support and other deprecated features. Pyparsing
now requires Python 3.5 or later. If you are using an earlier
version of Python, you must use a Pyparsing 2.4.x version

Deprecated features removed:
. ParseResults.asXML() - if used for debugging, switch
 to using ParseResults.dump(); if used for data transfer,
 use ParseResults.asDict() to convert to a nested Python
 dict, which can then be converted to XML or JSON or
 other transfer format

. operatorPrecedence synonym for infixNotation -
 convert to calling infixNotation

. commaSeparatedList - convert to using
 pyparsing_common.comma_separated_list

. upcaseTokens and downcaseTokens - convert to using
 pyparsing_common.upcaseTokens and downcaseTokens

. __compat__.collect_all_And_tokens will not be settable to
 False to revert to pre-2.3.1 results name behavior -
 review use of names for MatchFirst and Or expressions
 containing And expressions, as they will return the
 complete list of parsed tokens, not just the first one.
 Use `__diag__.warn_multiple_tokens_in_named_alternation`
 to help identify those expressions in your parsers that
 will have changed as a result.

- Removed support for running `python setup.py test`. The setuptools
maintainers consider the test command deprecated (see
<https://github.com/pypa/setuptools/issues/1684>). To run the Pyparsing test,
use the command `tox`.

- API CHANGE:
The staticmethod `ParseException.explain` has been moved to
`ParseBaseException.explain_exception`, and a new `explain` instance
method added to ParseBaseException. This will make calls to `explain`
much more natural:

   try:
       expr.parseString("...")
   except ParseException as pe:
       print(pe.explain())

- POTENTIAL API CHANGE:
ZeroOrMore expressions that have results names will now
include empty lists for their name if no matches are found.
Previously, no named result would be present. Code that tested
for the presence of any expressions using "if name in results:"
will now always return True. This code will need to change to
"if name in results and results[name]:" or just
"if results[name]:". Also, any parser unit tests that check the
asDict() contents will now see additional entries for parsers
having named ZeroOrMore expressions, whose values will be `[]`.

- POTENTIAL API CHANGE:
Fixed a bug in which calls to ParserElement.setDefaultWhitespaceChars
did not change whitespace definitions on any pyparsing built-in
expressions defined at import time (such as quotedString, or those
defined in pyparsing_common). This would lead to confusion when
built-in expressions would not use updated default whitespace
characters. Now a call to ParserElement.setDefaultWhitespaceChars
will also go and update all pyparsing built-ins to use the new
default whitespace characters. (Note that this will only modify
expressions defined within the pyparsing module.) Prompted by
work on a StackOverflow question posted by jtiai.

- Expanded __diag__ and __compat__ to actual classes instead of
just namespaces, to add some helpful behavior:
- enable() and .disable() methods to give extra
 help when setting or clearing flags (detects invalid
 flag names, detects when trying to set a __compat__ flag
 that is no longer settable). Use these methods now to
 set or clear flags, instead of directly setting to True or
 False.

     import pyparsing as pp
     pp.__diag__.enable("warn_multiple_tokens_in_named_alternation")

- __diag__.enable_all_warnings() is another helper that sets
 all "warn*" diagnostics to True.

     pp.__diag__.enable_all_warnings()

- added new warning, "warn_on_match_first_with_lshift_operator" to
 warn when using '<<' with a '|' MatchFirst operator, which will
 create an unintended expression due to precedence of operations.

 Example: This statement will erroneously define the `fwd` expression
 as just `expr_a`, even though `expr_a | expr_b` was intended,
 since '<<' operator has precedence over '|':

     fwd << expr_a | expr_b

 To correct this, use the '<<=' operator (preferred) or parentheses
 to override operator precedence:

     fwd <<= expr_a | expr_b
              or
     fwd << (expr_a | expr_b)

- Cleaned up default tracebacks when getting a ParseException when calling
parseString. Exception traces should now stop at the call in parseString,
and not include the internal traceback frames. (If the full traceback
is desired, then set ParserElement.verbose_traceback to True.)

- Fixed FutureWarnings that sometimes are raised when '[' passed as a
character to Word.

- New namespace, assert methods and classes added to support writing
unit tests.
- assertParseResultsEquals
- assertParseAndCheckList
- assertParseAndCheckDict
- assertRunTestResults
- assertRaisesParseException
- reset_pyparsing_context context manager, to restore pyparsing
 config settings

- Enhanced error messages and error locations when parsing fails on
the Keyword or CaselessKeyword classes due to the presence of a
preceding or trailing keyword character. Surfaced while
working with metaperl on issue 201.

- Enhanced the Regex class to be compatible with re's compiled with the
re-equivalent regex module. Individual expressions can be built with
regex compiled expressions using:

 import pyparsing as pp
 import regex

  would use regex for this expression
 integer_parser = pp.Regex(regex.compile(r'\d+'))

Inspired by PR submitted by bjrnfrdnnd on GitHub, very nice!

- Fixed handling of ParseSyntaxExceptions raised as part of Each
expressions, when sub-expressions contain '-' backtrack
suppression. As part of resolution to a question posted by John
Greene on StackOverflow.

- Potentially *huge* performance enhancement when parsing Word
expressions built from pyparsing_unicode character sets. Word now
internally converts ranges of consecutive characters to regex
character ranges (converting "0123456789" to "0-9" for instance),
resulting in as much as 50X improvement in performance! Work
inspired by a question posted by Midnighter on StackOverflow.

- Improvements in select_parser.py, to include new SQL syntax
from SQLite. PR submitted by Robert Coup, nice work!

- Fixed bug in PrecededBy which caused infinite recursion, issue 127
submitted by EdwardJB.

- Fixed bug in CloseMatch where end location was incorrectly
computed; and updated partial_gene_match.py example.

- Fixed bug in indentedBlock with a parser using two different
types of nested indented blocks with different indent values,
but sharing the same indent stack, submitted by renzbagaporo.

- Fixed bug in Each when using Regex, when Regex expression would
get parsed twice; issue 183 submitted by scauligi, thanks!

- BigQueryViewParser.py added to examples directory, PR submitted
by Michael Smedberg, nice work!

- booleansearchparser.py added to examples directory, PR submitted
by xecgr. Builds on searchparser.py, adding support for '*'
wildcards and non-Western alphabets.

- Fixed bug in delta_time.py example, when using a quantity
of seconds/minutes/hours/days > 999.

- Fixed bug in regex definitions for real and sci_real expressions in
pyparsing_common. Issue 194, reported by Michael Wayne Goodman, thanks!

- Fixed FutureWarning raised beginning in Python 3.7 for Regex expressions
containing '[' within a regex set.

- Minor reformatting of output from runTests to make embedded
comments more visible.

- And finally, many thanks to those who helped in the restructuring
of the pyparsing code base as part of this release. Pyparsing now
has more standard package structure, more standard unit tests,
and more standard code formatting (using black). Special thanks
to jdufresne, klahnakoski, mattcarmody, and ckeygusuz, to name just
a few.

Links

• PyPI: https://pypi.org/project/pyparsing
• Changelog: https://pyup.io/changelogs/pyparsing/
• Repo: https://github.com/pyparsing/pyparsing/
• Docs: https://pythonhosted.org/pyparsing/

[pyup-bot]

Closing this in favor of #2037