MNT: use a global constant for disabling the warning

Author: ngoldbaum

pandas/compat/_constants.py

@@ -19,13 +19,9 @@
 PYPY = platform.python_implementation() == "PyPy"
 WASM = (sys.platform == "emscripten") or (platform.machine() in ["wasm32", "wasm64"])
 ISMUSL = "musl" in (sysconfig.get_config_var("HOST_GNU_TYPE") or "")
-if PY311:
-    REF_COUNT = 2
-elif PY314:
-    REF_COUNT = 1
-else:
-    # Python 3.10 and older
-    REF_COUNT = 3
+REF_COUNT = 2 if PY311 else 3
+# hopefully there is a workaround in Python 3.14.1
+WARNING_CHECK_BROKEN = PY314
 
 __all__ = [
     "IS64",

pandas/core/frame.py

@@ -49,7 +49,7 @@
 from pandas._libs.hashtable import duplicated
 from pandas._libs.lib import is_range_indexer
 from pandas.compat import PYPY
-from pandas.compat._constants import REF_COUNT
+from pandas.compat._constants import REF_COUNT, WARNING_CHECK_BROKEN
 from pandas.compat._optional import import_optional_dependency
 from pandas.compat.numpy import function as nv
 from pandas.errors import (
@@ -4296,7 +4296,7 @@ def __setitem__(self, key, value) -> None:
         z  3  50
         # Values for 'a' and 'b' are completely ignored!
         """
-        if not PYPY and sys.version_info < (3, 14):
+        if not PYPY and not WARNING_CHECK_BROKEN:
             if sys.getrefcount(self) <= REF_COUNT + 1:
                 warnings.warn(
                     _chained_assignment_msg, ChainedAssignmentError, stacklevel=2
@@ -9204,7 +9204,7 @@ def update(
         1  2  500.0
         2  3    6.0
         """
-        if not PYPY and sys.version_info < (3, 14):
+        if not PYPY and not WARNING_CHECK_BROKEN:
             if sys.getrefcount(self) <= REF_COUNT:
                 warnings.warn(
                     _chained_assignment_method_msg,

pandas/core/generic.py

@@ -83,7 +83,7 @@
     npt,
 )
 from pandas.compat import PYPY
-from pandas.compat._constants import REF_COUNT
+from pandas.compat._constants import REF_COUNT, WARNING_CHECK_BROKEN
 from pandas.compat._optional import import_optional_dependency
 from pandas.compat.numpy import function as nv
 from pandas.errors import (
@@ -7069,7 +7069,7 @@ def fillna(
         """
         inplace = validate_bool_kwarg(inplace, "inplace")
         if inplace:
-            if not PYPY and sys.version_info < (3, 14):
+            if not PYPY and WARNING_CHECK_BROKEN:
                 if sys.getrefcount(self) <= REF_COUNT:
                     warnings.warn(
                         _chained_assignment_method_msg,
@@ -7300,7 +7300,7 @@ def ffill(
         """
         inplace = validate_bool_kwarg(inplace, "inplace")
         if inplace:
-            if not PYPY and sys.version_info < (3, 14):
+            if not PYPY and WARNING_CHECK_BROKEN:
                 if sys.getrefcount(self) <= REF_COUNT:
                     warnings.warn(
                         _chained_assignment_method_msg,
@@ -7440,7 +7440,7 @@ def bfill(
         """
         inplace = validate_bool_kwarg(inplace, "inplace")
         if inplace:
-            if not PYPY and sys.version_info < (3, 14):
+            if not PYPY and WARNING_CHECK_BROKEN:
                 if sys.getrefcount(self) <= REF_COUNT:
                     warnings.warn(
                         _chained_assignment_method_msg,
@@ -7525,7 +7525,7 @@ def replace(
 
         inplace = validate_bool_kwarg(inplace, "inplace")
         if inplace:
-            if not PYPY and sys.version_info < (3, 14):
+            if not PYPY and WARNING_CHECK_BROKEN:
                 if sys.getrefcount(self) <= REF_COUNT:
                     warnings.warn(
                         _chained_assignment_method_msg,
@@ -7888,7 +7888,7 @@ def interpolate(
         inplace = validate_bool_kwarg(inplace, "inplace")
 
         if inplace:
-            if not PYPY and sys.version_info < (3, 14):
+            if not PYPY and WARNING_CHECK_BROKEN:
                 if sys.getrefcount(self) <= REF_COUNT:
                     warnings.warn(
                         _chained_assignment_method_msg,
@@ -8472,7 +8472,7 @@ def clip(
         inplace = validate_bool_kwarg(inplace, "inplace")
 
         if inplace:
-            if not PYPY and sys.version_info < (3, 14):
+            if not PYPY and WARNING_CHECK_BROKEN:
                 if sys.getrefcount(self) <= REF_COUNT:
                     warnings.warn(
                         _chained_assignment_method_msg,
@@ -10081,7 +10081,7 @@ def where(
         """
         inplace = validate_bool_kwarg(inplace, "inplace")
         if inplace:
-            if not PYPY and sys.version_info < (3, 14):
+            if not PYPY and WARNING_CHECK_BROKEN:
                 if sys.getrefcount(self) <= REF_COUNT:
                     warnings.warn(
                         _chained_assignment_method_msg,
@@ -10145,7 +10145,7 @@ def mask(
     ) -> Self | None:
         inplace = validate_bool_kwarg(inplace, "inplace")
         if inplace:
-            if not PYPY and sys.version_info < (3, 14):
+            if not PYPY and WARNING_CHECK_BROKEN:
                 if sys.getrefcount(self) <= REF_COUNT:
                     warnings.warn(
                         _chained_assignment_method_msg,

pandas/core/indexing.py

@@ -15,7 +15,7 @@
 from pandas._libs.indexing import NDFrameIndexerBase
 from pandas._libs.lib import item_from_zerodim
 from pandas.compat import PYPY
-from pandas.compat._constants import REF_COUNT
+from pandas.compat._constants import REF_COUNT, WARNING_CHECK_BROKEN
 from pandas.errors import (
     AbstractMethodError,
     ChainedAssignmentError,
@@ -914,7 +914,7 @@ def _ensure_listlike_indexer(self, key, axis=None, value=None) -> None:
 
     @final
     def __setitem__(self, key, value) -> None:
-        if not PYPY and sys.version_info < (3, 14):
+        if not PYPY and not WARNING_CHECK_BROKEN:
             if sys.getrefcount(self.obj) <= REF_COUNT:
                 warnings.warn(
                     _chained_assignment_msg, ChainedAssignmentError, stacklevel=2

pandas/core/series.py

@@ -34,7 +34,7 @@
 )
 from pandas._libs.lib import is_range_indexer
 from pandas.compat import PYPY
-from pandas.compat._constants import REF_COUNT
+from pandas.compat._constants import REF_COUNT, WARNING_CHECK_BROKEN
 from pandas.compat._optional import import_optional_dependency
 from pandas.compat.numpy import function as nv
 from pandas.errors import (
@@ -1059,7 +1059,7 @@ def _get_value(self, label, takeable: bool = False):
             return self.iloc[loc]
 
     def __setitem__(self, key, value) -> None:
-        if not PYPY and sys.version_info < (3, 14):
+        if not PYPY and not WARNING_CHECK_BROKEN:
             if sys.getrefcount(self) <= REF_COUNT + 1:
                 warnings.warn(
                     _chained_assignment_msg, ChainedAssignmentError, stacklevel=2
@@ -3338,7 +3338,7 @@ def update(self, other: Series | Sequence | Mapping) -> None:
         2    3
         dtype: int64
         """
-        if not PYPY and sys.version_info < (3, 14):
+        if not PYPY and not WARNING_CHECK_BROKEN:
             if sys.getrefcount(self) <= REF_COUNT:
                 warnings.warn(
                     _chained_assignment_method_msg,