rive_n <rivenfornotificati...@gmail.com> added the comment:
Hi again.
previous solution with:
```python3
try:
namespace, args = self._parse_known_args(args, namespace)
if hasattr(namespace, _UNRECOGNIZED_ARGS_ATTR):
args.extend(getattr(namespace, _UNRECOGNIZED_ARGS_ATTR))
delattr(namespace, _UNRECOGNIZED_ARGS_ATTR)
return namespace, args
except ArgumentError:
err = _sys.exc_info()[1]
self.error(str(err))
```
Is not working at all. So i spent some time (a lot of time) to make changes in
source code.
I figured out exactly how the algorithm works, I read about 3,000 lines of
code. And here's what I came up with:
argparse.py:
line 1774: parse_known_args
basically this function calling protected one on line 1800:
amespace, args = self._parse_known_args(args, namespace)
This one is making magic. But we need to check line 1856:
def take_action(action, argument_strings, option_string=None):
This function creating objects of necessary classes. For example:
_SubParsersAction (problem in it).
Before fix:
```python3
def __call__(self, parser, namespace, values, option_string=None):
parser_name = values[0]
arg_strings = values[1:]
# set the parser name if requested
if self.dest is not SUPPRESS:
setattr(namespace, self.dest, parser_name)
# select the parser
try:
parser = self._name_parser_map[parser_name]
except KeyError:
args = {'parser_name': parser_name,
'choices': ', '.join(self._name_parser_map)}
msg = _('unknown parser %(parser_name)r (choices: %(choices)s)') %
args
raise ArgumentError(self, msg)
# parse all the remaining options into the namespace
# store any unrecognized options on the object, so that the top
# level parser can decide what to do with them
# In case this subparser defines new defaults, we parse them
# in a new namespace object and then update the original
# namespace for the relevant parts.
subnamespace, arg_strings = parser.parse_known_args(arg_strings, None)
for key, value in vars(subnamespace).items():
setattr(namespace, key, value)
if arg_strings:
vars(namespace).setdefault(_UNRECOGNIZED_ARGS_ATTR, [])
getattr(namespace, _UNRECOGNIZED_ARGS_ATTR).extend(arg_strings)
```
After fix:
```python3
def __call__(self, parser, namespace, values, option_string=None,
arg_strings_pattern:list =None):
o_amount = arg_strings_pattern.count("O")
if not o_amount:
raise ValueError("No Os found")
o_start, o_stop, indexes = arg_strings_pattern.index('O'),
len(arg_strings_pattern), []
print(parser)
try:
while arg_strings_pattern.index('O', o_start, o_stop):
indexes.append(arg_strings_pattern.index('O', o_start, o_stop))
o_start = arg_strings_pattern.index('O', o_start + 1, o_stop)
except ValueError:
pass
for parser in range(o_amount):
parser_name = values[indexes[parser] - 1] # indexes[parser] could
give int (real index)
arg_strings = values[indexes[parser]: indexes[(parser + 1)] - 1]
if parser < len(indexes) - 1 else \
values[indexes[parser]:] # could give all data
# set the parser name if requested
if self.dest is not SUPPRESS:
setattr(namespace, self.dest, parser_name)
# select the parser
try:
parser = self._name_parser_map[parser_name]
except KeyError:
args = {'parser_name': parser_name,
'choices': ', '.join(self._name_parser_map)}
msg = _('unknown parser %(parser_name)r (choices:
%(choices)s)') % args
raise ArgumentError(self, msg)
# parse all the remaining options into the namespace
# store any unrecognized options on the object, so that the top
# level parser can decide what to do with them
# In case this subparser defines new defaults, we parse them
# in a new namespace object and then update the original
# namespace for the relevant parts.
subnamespace, arg_strings = parser.parse_known_args(arg_strings,
None)
for key, value in vars(subnamespace).items():
setattr(namespace, key, value)
if arg_strings:
vars(namespace).setdefault(_UNRECOGNIZED_ARGS_ATTR, [])
getattr(namespace, _UNRECOGNIZED_ARGS_ATTR).extend(arg_strings)
```
That's not the best solution but this solution works.
----------
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue47043>
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