[utils] traverse_obj: Allow re.Match objects (#5174)

Authored by: Grub4K
This commit is contained in:
Simon Sawicki 2022-10-09 03:31:37 +02:00 committed by GitHub
parent f99bbfc983
commit 7b0127e1e1
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2 changed files with 39 additions and 3 deletions

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@ -2,6 +2,7 @@
# Allow direct execution
import os
import re
import sys
import unittest
@ -2080,6 +2081,25 @@ Line 1
with self.assertRaises(TypeError, msg='too many params should result in error'):
traverse_obj(_IS_USER_INPUT_DATA, ('range8', ':::'), is_user_input=True)
# Test re.Match as input obj
mobj = re.fullmatch(r'0(12)(?P<group>3)(4)?', '0123')
self.assertEqual(traverse_obj(mobj, ...), [x for x in mobj.groups() if x is not None],
msg='`...` on a `re.Match` should give its `groups()`')
self.assertEqual(traverse_obj(mobj, lambda k, _: k in (0, 2)), ['0123', '3'],
msg='function on a `re.Match` should give groupno, value starting at 0')
self.assertEqual(traverse_obj(mobj, 'group'), '3',
msg='str key on a `re.Match` should give group with that name')
self.assertEqual(traverse_obj(mobj, 2), '3',
msg='int key on a `re.Match` should give group with that name')
self.assertEqual(traverse_obj(mobj, 'gRoUp', casesense=False), '3',
msg='str key on a `re.Match` should respect casesense')
self.assertEqual(traverse_obj(mobj, 'fail'), None,
msg='failing str key on a `re.Match` should return `default`')
self.assertEqual(traverse_obj(mobj, 'gRoUpS', casesense=False), None,
msg='failing str key on a `re.Match` should return `default`')
self.assertEqual(traverse_obj(mobj, 8), None,
msg='failing int key on a `re.Match` should return `default`')
if __name__ == '__main__':
unittest.main()

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@ -5305,13 +5305,14 @@ def traverse_obj(
Each of the provided `paths` is tested and the first producing a valid result will be returned.
The next path will also be tested if the path branched but no results could be found.
Supported values for traversal are `Mapping`, `Sequence` and `re.Match`.
A value of None is treated as the absence of a value.
The paths will be wrapped in `variadic`, so that `'key'` is conveniently the same as `('key', )`.
The keys in the path can be one of:
- `None`: Return the current object.
- `str`/`int`: Return `obj[key]`.
- `str`/`int`: Return `obj[key]`. For `re.Match, return `obj.group(key)`.
- `slice`: Branch out and return all values in `obj[key]`.
- `Ellipsis`: Branch out and return a list of all values.
- `tuple`/`list`: Branch out and return a list of all matching values.
@ -5322,7 +5323,7 @@ def traverse_obj(
- `dict` Transform the current object and return a matching dict.
Read as: `{key: traverse_obj(obj, path) for key, path in dct.items()}`.
`tuple`, `list`, and `dict` all support nested paths and branches
`tuple`, `list`, and `dict` all support nested paths and branches.
@params paths Paths which to traverse by.
@param default Value to return if the paths do not match.
@ -5370,6 +5371,8 @@ def traverse_obj(
yield from obj.values()
elif is_sequence(obj):
yield from obj
elif isinstance(obj, re.Match):
yield from obj.groups()
elif traverse_string:
yield from str(obj)
@ -5378,6 +5381,8 @@ def traverse_obj(
iter_obj = enumerate(obj)
elif isinstance(obj, collections.abc.Mapping):
iter_obj = obj.items()
elif isinstance(obj, re.Match):
iter_obj = enumerate((obj.group(), *obj.groups()))
elif traverse_string:
iter_obj = enumerate(str(obj))
else:
@ -5389,10 +5394,21 @@ def traverse_obj(
yield {k: v if v is not None else default for k, v in iter_obj
if v is not None or default is not NO_DEFAULT}
elif isinstance(obj, dict):
elif isinstance(obj, collections.abc.Mapping):
yield (obj.get(key) if casesense or (key in obj)
else next((v for k, v in obj.items() if casefold(k) == key), None))
elif isinstance(obj, re.Match):
if isinstance(key, int) or casesense:
with contextlib.suppress(IndexError):
yield obj.group(key)
return
if not isinstance(key, str):
return
yield next((v for k, v in obj.groupdict().items() if casefold(k) == key), None)
else:
if is_user_input:
key = (int_or_none(key) if ':' not in key