Using dict as an OrderedDict and allowed using dict as an order…

…ed type in `setuptools.dist.check_requirements` (#4575)

newsfragments/4575.feature.rst

@@ -0,0 +1 @@
+Allowed using `dict` as an ordered type in ``setuptools.dist.check_requirements`` -- by :user:`Avasam`

setuptools/command/_requirestxt.py

@@ -18,12 +18,11 @@
 from packaging.requirements import Requirement
 
 from .. import _reqs
+from .._reqs import _StrOrIter
 
 # dict can work as an ordered set
 _T = TypeVar("_T")
 _Ordered = Dict[_T, None]
-_ordered = dict
-_StrOrIter = _reqs._StrOrIter
 
 
 def _prepare(

setuptools/command/egg_info.py

@@ -2,7 +2,6 @@
 
 Create a distribution's .egg-info directory and contents"""
 
-import collections
 import functools
 import os
 import re
@@ -211,11 +210,9 @@ def save_version_info(self, filename):
         build tag. Install build keys in a deterministic order
         to avoid arbitrary reordering on subsequent builds.
         """
-        egg_info = collections.OrderedDict()
         # follow the order these keys would have been added
         # when PYTHONHASHSEED=0
-        egg_info['tag_build'] = self.tags()
-        egg_info['tag_date'] = 0
+        egg_info = dict(tag_build=self.tags(), tag_date=0)
         edit_config(filename, dict(egg_info=egg_info))
 
     def finalize_options(self):

setuptools/dist.py

@@ -11,12 +11,12 @@
 from typing import (
     TYPE_CHECKING,
     Any,
+    Dict,
     List,
     MutableMapping,
-    NoReturn,
+    Sequence,
     Tuple,
     Union,
-    overload,
 )
 
 from more_itertools import partition, unique_everseen
@@ -30,7 +30,6 @@
     command as _,  # noqa: F401 # imported for side-effects
 )
 from ._importlib import metadata
-from ._reqs import _StrOrIter
 from .config import pyprojecttoml, setupcfg
 from .discovery import ConfigDiscovery
 from .monkey import get_unpatched
@@ -63,7 +62,13 @@
 """
 _Sequence: TypeAlias = Union[Tuple[str, ...], List[str]]
 # This is how stringifying _Sequence would look in Python 3.10
-_requence_type_repr = "tuple[str, ...] | list[str]"
+_sequence_type_repr = "tuple[str, ...] | list[str]"
+_OrderedStrSequence: TypeAlias = Union[str, Dict[str, Any], Sequence[str]]
+"""
+:meta private:
+Avoid single-use iterable. Disallow sets.
+A poor approximation of an OrderedSequence (dict doesn't match a Sequence).
+"""
 
 
 def __getattr__(name: str) -> Any:  # pragma: no cover
@@ -97,7 +102,7 @@ def assert_string_list(dist, attr: str, value: _Sequence) -> None:
         assert ''.join(value) != value
     except (TypeError, ValueError, AttributeError, AssertionError) as e:
         raise DistutilsSetupError(
-            f"{attr!r} must be of type <{_requence_type_repr}> (got {value!r})"
+            f"{attr!r} must be of type <{_sequence_type_repr}> (got {value!r})"
         ) from e
 
 
@@ -173,15 +178,11 @@ def invalid_unless_false(dist, attr, value):
     raise DistutilsSetupError(f"{attr} is invalid.")
 
 
-@overload
-def check_requirements(dist, attr: str, value: set | dict) -> NoReturn: ...
-@overload
-def check_requirements(dist, attr: str, value: _StrOrIter) -> None: ...
-def check_requirements(dist, attr: str, value: _StrOrIter) -> None:
+def check_requirements(dist, attr: str, value: _OrderedStrSequence) -> None:
     """Verify that install_requires is a valid requirements list"""
     try:
         list(_reqs.parse(value))
-        if isinstance(value, (dict, set)):
+        if isinstance(value, set):
             raise TypeError("Unordered types are not allowed")
     except (TypeError, ValueError) as error:
         msg = (
@@ -810,7 +811,7 @@ def _exclude_misc(self, name: str, value: _Sequence) -> None:
         """Handle 'exclude()' for list/tuple attrs without a special handler"""
         if not isinstance(value, _sequence):
             raise DistutilsSetupError(
-                f"{name}: setting must be of type <{_requence_type_repr}> (got {value!r})"
+                f"{name}: setting must be of type <{_sequence_type_repr}> (got {value!r})"
             )
         try:
             old = getattr(self, name)
@@ -828,7 +829,7 @@ def _include_misc(self, name: str, value: _Sequence) -> None:
 
         if not isinstance(value, _sequence):
             raise DistutilsSetupError(
-                f"{name}: setting must be of type <{_requence_type_repr}> (got {value!r})"
+                f"{name}: setting must be of type <{_sequence_type_repr}> (got {value!r})"
             )
         try:
             old = getattr(self, name)
@@ -870,7 +871,7 @@ def exclude(self, **attrs):
     def _exclude_packages(self, packages: _Sequence) -> None:
         if not isinstance(packages, _sequence):
             raise DistutilsSetupError(
-                f"packages: setting must be of type <{_requence_type_repr}> (got {packages!r})"
+                f"packages: setting must be of type <{_sequence_type_repr}> (got {packages!r})"
             )
         list(map(self.exclude_package, packages))
 

setuptools/tests/test_core_metadata.py

@@ -310,7 +310,6 @@ def test_parity_with_metadata_from_pypa_wheel(tmp_path):
         python_requires=">=3.8",
         install_requires="""
         packaging==23.2
-        ordered-set==3.1.1
         more-itertools==8.8.0; extra == "other"
         jaraco.text==3.7.0
         importlib-resources==5.10.2; python_version<"3.8"

setuptools/tests/test_dist.py

@@ -1,4 +1,3 @@
-import collections
 import os
 import re
 import urllib.parse
@@ -72,15 +71,10 @@ def sdist_with_index(distname, version):
 
 
 def test_provides_extras_deterministic_order():
-    extras = collections.OrderedDict()
-    extras['a'] = ['foo']
-    extras['b'] = ['bar']
-    attrs = dict(extras_require=extras)
+    attrs = dict(extras_require=dict(a=['foo'], b=['bar']))
     dist = Distribution(attrs)
     assert list(dist.metadata.provides_extras) == ['a', 'b']
-    attrs['extras_require'] = collections.OrderedDict(
-        reversed(list(attrs['extras_require'].items()))
-    )
+    attrs['extras_require'] = dict(reversed(attrs['extras_require'].items()))
     dist = Distribution(attrs)
     assert list(dist.metadata.provides_extras) == ['b', 'a']