Cleanup sys.version_info compat code

pymongo/asynchronous/helpers.py

@@ -313,9 +313,10 @@ async def inner(*args: Any, **kwargs: Any) -> Any:
     return cast(F, inner)
 
 
-async def anext(cls: Any) -> Any:
-    """Compatibility function until we drop 3.9 support: https://docs.python.org/3/library/functions.html#anext."""
-    if sys.version_info >= (3, 10):
-        return await builtins.anext(cls)
-    else:
+if sys.version_info >= (3, 10):
+    anext = builtins.anext
+else:
+
+    async def anext(cls: Any) -> Any:
+        """Compatibility function until we drop 3.9 support: https://docs.python.org/3/library/functions.html#anext."""
         return await cls.__anext__()

pymongo/asynchronous/mongo_client.py

@@ -112,7 +112,6 @@
 from pymongo.write_concern import DEFAULT_WRITE_CONCERN, WriteConcern
 
 if TYPE_CHECKING:
-    import sys
     from types import TracebackType
 
     from bson.objectid import ObjectId
@@ -126,11 +125,6 @@
     from pymongo.asynchronous.server_selectors import Selection
     from pymongo.read_concern import ReadConcern
 
-    if sys.version_info[:2] >= (3, 9):
-        pass
-    else:
-        # Deprecated since version 3.9: collections.abc.Generator now supports [].
-        pass
 
 T = TypeVar("T")
 

pymongo/synchronous/helpers.py

@@ -313,9 +313,10 @@ def inner(*args: Any, **kwargs: Any) -> Any:
     return cast(F, inner)
 
 
-def next(cls: Any) -> Any:
-    """Compatibility function until we drop 3.9 support: https://docs.python.org/3/library/functions.html#anext."""
-    if sys.version_info >= (3, 10):
-        return builtins.next(cls)
-    else:
+if sys.version_info >= (3, 10):
+    next = builtins.next
+else:
+
+    def next(cls: Any) -> Any:
+        """Compatibility function until we drop 3.9 support: https://docs.python.org/3/library/functions.html#anext."""
         return cls.__next__()

pymongo/synchronous/mongo_client.py

@@ -111,7 +111,6 @@
 from pymongo.write_concern import DEFAULT_WRITE_CONCERN, WriteConcern
 
 if TYPE_CHECKING:
-    import sys
     from types import TracebackType
 
     from bson.objectid import ObjectId
@@ -125,11 +124,6 @@
     from pymongo.synchronous.server import Server
     from pymongo.synchronous.server_selectors import Selection
 
-    if sys.version_info[:2] >= (3, 9):
-        pass
-    else:
-        # Deprecated since version 3.9: collections.abc.Generator now supports [].
-        pass
 
 T = TypeVar("T")
 

test/unified_format.py

@@ -195,14 +195,10 @@ def with_metaclass(meta, *bases):
     # the actual metaclass.
     class metaclass(type):
         def __new__(cls, name, this_bases, d):
-            if sys.version_info[:2] >= (3, 7):  # noqa: UP036
-                # This version introduced PEP 560 that requires a bit
-                # of extra care (we mimic what is done by __build_class__).
-                resolved_bases = types.resolve_bases(bases)
-                if resolved_bases is not bases:
-                    d["__orig_bases__"] = bases
-            else:
-                resolved_bases = bases
+            # __orig_bases__ is required by PEP 560.
+            resolved_bases = types.resolve_bases(bases)
+            if resolved_bases is not bases:
+                d["__orig_bases__"] = bases
             return meta(name, resolved_bases, d)
 
         @classmethod