Use exceptiongroup backport

Author: Zac-HD

hypothesis-python/setup.py

@@ -100,7 +100,11 @@ def local_file(name):
     description="A library for property-based testing",
     zip_safe=False,
     extras_require=extras,
-    install_requires=["attrs>=19.2.0", "sortedcontainers>=2.1.0,<3.0.0"],
+    install_requires=[
+        "attrs>=19.2.0",
+        "exceptiongroup>=1.0.0rc8 ; python_version<'3.11.0b1'",
+        "sortedcontainers>=2.1.0,<3.0.0",
+    ],
     python_requires=">=3.7",
     classifiers=[
         "Development Status :: 5 - Production/Stable",

hypothesis-python/src/hypothesis/internal/compat.py

@@ -16,11 +16,12 @@
 
 try:
     BaseExceptionGroup = BaseExceptionGroup
-except NameError:  # pragma: no cover
-    try:
-        from exceptiongroup import BaseExceptionGroup as BaseExceptionGroup  # for mypy
-    except ImportError:
-        BaseExceptionGroup = ()  # valid in isinstance and except clauses!
+    ExceptionGroup = ExceptionGroup  # pragma: no cover
+except NameError:
+    from exceptiongroup import (
+        BaseExceptionGroup as BaseExceptionGroup,
+        ExceptionGroup as ExceptionGroup,
+    )
 
 PYPY = platform.python_implementation() == "PyPy"
 WINDOWS = platform.system() == "Windows"

hypothesis-python/src/hypothesis/strategies/_internal/types.py

@@ -28,7 +28,7 @@
 
 from hypothesis import strategies as st
 from hypothesis.errors import InvalidArgument, ResolutionFailed
-from hypothesis.internal.compat import PYPY
+from hypothesis.internal.compat import PYPY, BaseExceptionGroup, ExceptionGroup
 from hypothesis.internal.conjecture.utils import many as conjecture_utils_many
 from hypothesis.strategies._internal.datetime import zoneinfo  # type: ignore
 from hypothesis.strategies._internal.ipaddress import (
@@ -554,6 +554,16 @@ def _networks(bits):
     UnicodeTranslateError: st.builds(
         UnicodeTranslateError, st.text(), st.just(0), st.just(0), st.just("reason")
     ),
+    BaseExceptionGroup: st.builds(
+        BaseExceptionGroup,
+        st.text(),
+        st.lists(st.from_type(BaseException), min_size=1),
+    ),
+    ExceptionGroup: st.builds(
+        ExceptionGroup,
+        st.text(),
+        st.lists(st.from_type(Exception), min_size=1),
+    ),
     enumerate: st.builds(enumerate, st.just(())),
     filter: st.builds(filter, st.just(lambda _: None), st.just(())),
     map: st.builds(map, st.just(lambda _: None), st.just(())),
@@ -569,21 +579,6 @@ def _networks(bits):
     _global_type_lookup[zoneinfo.ZoneInfo] = st.timezones()
 if PYPY:
     _global_type_lookup[builtins.sequenceiterator] = st.builds(iter, st.tuples())  # type: ignore
-try:
-    BaseExceptionGroup  # type: ignore # noqa
-except NameError:
-    pass
-else:  # pragma: no cover
-    _global_type_lookup[BaseExceptionGroup] = st.builds(  # type: ignore
-        BaseExceptionGroup,  # type: ignore
-        st.text(),
-        st.lists(st.from_type(BaseException), min_size=1),
-    )
-    _global_type_lookup[ExceptionGroup] = st.builds(  # type: ignore
-        ExceptionGroup,  # type: ignore
-        st.text(),
-        st.lists(st.from_type(Exception), min_size=1),
-    )
 
 
 _global_type_lookup[type] = st.sampled_from(