Programmiererforum

Code: Select all

first_and_operator = Group(Char('ab')('first') + Char('+-')('operator'))
full_expression = Group(first_and_operator + Char('cd')('second'))
< /code>
full_expression.parse_string('a + d', parse_all = True)
< /code>
Dies gibt beispielsweise die folgenden Ergebnisse aus: < /p>
ParseResults([
ParseResults([
# How to know that this is first_and_operator's results?
ParseResults(['a', '+'], {'first': 'a', 'operator': '+'}),
'd'
], {'second': 'd'})
], {})

Code: Select all

[
attr_value for attr in dir(results)
if not attr.startswith('__')
and not callable(attr_value := getattr(results, attr))
]
< /code>
[
('_all_names', set()), ('_modal', True), ('_name', 'first'),
('_null_values', (None, [], ())), ('_parent', None),
('_tokdict', {...: ...}), ('_toklist', ['a', '+']),
('first', 'a'), ('operator', '+')
]

Code: Select all

expression_list = Expand(full_expression) + (',' + Expand(full_expression))[1, ...]
< /code>
expression_list.parse_string('a + c, a - d, b + d', parse_all = True)
< /code>
ParseResults([
ParseResults(['a', '+'], {'first': 'a', 'operator': '+'}),
'c', ',',
ParseResults(['a', '-'], {'first': 'a', 'operator': '-'}),
'd', ',',
ParseResults(['b', '+'], {'first': 'b', 'operator': '+'}),
'd'
], {})
< /code>
Expand

Code: Select all

class TypedParseResults(ParseResults):
__slots__ = ('type',)

def __init__(self, *args, result_type: str, **kwargs):
self.type = result_type
super().__init__(*args, **kwargs)

@first_and_operator.add_parse_action
def make_results_typed(results: ParseResults):
return TypedParseResults(
self._toklist,
result_type = 'first_and_operator'
)
< /code>
This only ever raises an exception from somewhere deep down in core.py

Code: Select all

Traceback (most recent call last):
File ".../main.py", line 85, in 
r = full_expression.parse_string('a + d', parse_all = True)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...
File ".../site-packages/pyparsing/core.py", line 895, in _parseNoCache
ret_tokens = ParseResults(
^^^^^^^^^^^^^
TypeError: TypedParseResults.__init__() missing 1 required keyword-only argument: 'result_type'
< /code>
This question, while sounds similar, does not answer mine since it is about debugging and not runtime checking. Also, none of the answers at this question works for me, for various reasons:

[*]The first is incompatible with Expand