drop python<=37 support

pyproject.toml

@@ -9,13 +9,12 @@ build-backend = "hatchling.build"
 name = "attrs"
 authors = [{ name = "Hynek Schlawack", email = "hs@ox.cx" }]
 license = "MIT"
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 description = "Classes Without Boilerplate"
 keywords = ["class", "attribute", "boilerplate"]
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "License :: OSI Approved :: MIT License",
-  "Programming Language :: Python :: 3.7",
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",

src/attr/__init__.py

@@ -98,10 +98,7 @@ def __getattr__(name: str) -> str:
         import sys
         import warnings
 
-        if sys.version_info < (3, 8):
-            from importlib_metadata import metadata
-        else:
-            from importlib.metadata import metadata
+        from importlib.metadata import metadata
 
         if name not in ("__version__", "__version_info__"):
             warnings.warn(

src/attr/_compat.py

@@ -17,13 +17,7 @@
 PY_3_13_PLUS = sys.version_info[:2] >= (3, 13)
 
 
-if sys.version_info < (3, 8):
-    try:
-        from typing_extensions import Protocol
-    except ImportError:  # pragma: no cover
-        Protocol = object
-else:
-    from typing import Protocol  # noqa: F401
+from typing import Protocol  # noqa: F401
 
 
 class _AnnotationExtractor:

src/attr/_make.py

@@ -1979,9 +1979,9 @@ def _make_repr(attrs, ns, cls):
             "self." + name if i else 'getattr(self, "' + name + '", NOTHING)'
         )
         fragment = (
-            "%s={%s!r}" % (name, accessor)
+            f"{name}={{{accessor}!r}}"
             if r == repr
-            else "%s={%s_repr(%s)}" % (name, name, accessor)
+            else f"{name}={{{name}_repr({accessor})}}"
         )
         attribute_fragments.append(fragment)
     repr_fragment = ", ".join(attribute_fragments)
@@ -2208,11 +2208,7 @@ def _setattr_with_converter(attr_name, value_var, has_on_setattr):
     Use the cached object.setattr to set *attr_name* to *value_var*, but run
     its converter first.
     """
-    return "_setattr('%s', %s(%s))" % (
-        attr_name,
-        _INIT_CONVERTER_PAT % (attr_name,),
-        value_var,
-    )
+    return f"_setattr('{attr_name}', {_INIT_CONVERTER_PAT % (attr_name,)}({value_var}))"
 
 
 def _assign(attr_name, value, has_on_setattr):
@@ -2234,10 +2230,8 @@ def _assign_with_converter(attr_name, value_var, has_on_setattr):
     if has_on_setattr:
         return _setattr_with_converter(attr_name, value_var, True)
 
-    return "self.%s = %s(%s)" % (
-        attr_name,
-        _INIT_CONVERTER_PAT % (attr_name,),
-        value_var,
+    return (
+        f"self.{attr_name} = {_INIT_CONVERTER_PAT % (attr_name,)}({value_var})"
     )
 
 
@@ -2267,11 +2261,7 @@ def fmt_setter_with_converter(attr_name, value_var, has_on_setattr):
                     attr_name, value_var, has_on_setattr
                 )
 
-            return "_inst_dict['%s'] = %s(%s)" % (
-                attr_name,
-                _INIT_CONVERTER_PAT % (attr_name,),
-                value_var,
-            )
+            return f"_inst_dict['{attr_name}'] = {_INIT_CONVERTER_PAT % (attr_name,)}({value_var})"
 
         return (
             ("_inst_dict = self.__dict__",),
@@ -2514,12 +2504,12 @@ def _attrs_to_init_script(
     args = ", ".join(args)
     pre_init_args = args
     if kw_only_args:
-        args += "%s*, %s" % (
+        args += "{}*, {}".format(
             ", " if args else "",  # leading comma
             ", ".join(kw_only_args),  # kw_only args
         )
         pre_init_kw_only_args = ", ".join(
-            ["%s=%s" % (kw_arg, kw_arg) for kw_arg in kw_only_args]
+            [f"{kw_arg}={kw_arg}" for kw_arg in kw_only_args]
         )
         pre_init_args += (
             ", " if pre_init_args else ""

tests/test_packaging.py

@@ -1,19 +1,14 @@
 # SPDX-License-Identifier: MIT
 
-import sys
+
+from importlib import metadata
 
 import pytest
 
 import attr
 import attrs
 
 
-if sys.version_info < (3, 8):
-    import importlib_metadata as metadata
-else:
-    from importlib import metadata
-
-
 @pytest.fixture(name="mod", params=(attr, attrs))
 def _mod(request):
     return request.param

tests/test_slots.py

@@ -597,7 +597,7 @@ class C:
         field = attr.ib()
 
         def f(self, a):
-            super(C, self).__init__()  # noqa: UP008
+            super().__init__()
 
     C(field=1)
 
@@ -685,7 +685,7 @@ def f(self):
     class C(A):
         @property
         def f(self):
-            return super(C, self).f ** 2  # noqa: UP008
+            return super().f ** 2
 
     assert B(11).f == 121
     assert B(17).f == 289

tests/typing_example.py

@@ -56,7 +56,7 @@ class DD:
 
 @attr.s
 class EE:
-    y: "list[int]" = attr.ib()
+    y: list[int] = attr.ib()
 
 
 @attr.s