use helper for option

Author: jorisvandenbossche

pandas/core/frame.py

@@ -3842,10 +3842,7 @@ def isetitem(self, loc, value) -> None:
         self._iset_item_mgr(loc, arraylike, inplace=False)
 
     def __setitem__(self, key, value):
-        if (
-            get_option("mode.copy_on_write")
-            and get_option("mode.data_manager") == "block"
-        ):
+        if using_copy_on_write():
             if sys.getrefcount(self) <= 3:
                 raise ChainedAssignmentError("Chained assignment doesn't work!!")
 

pandas/core/indexing.py

@@ -13,7 +13,7 @@
 
 import numpy as np
 
-from pandas._config import get_option
+from pandas._config import using_copy_on_write
 
 from pandas._libs.indexing import NDFrameIndexerBase
 from pandas._libs.lib import item_from_zerodim
@@ -834,11 +834,8 @@ def _ensure_listlike_indexer(self, key, axis=None, value=None) -> None:
 
     @final
     def __setitem__(self, key, value) -> None:
-        if (
-            get_option("mode.copy_on_write")
-            and get_option("mode.data_manager") == "block"
-        ):
-            print("_LocationIndexer.__setitem__ refcount: ", sys.getrefcount(self.obj))
+        if using_copy_on_write():
+            # print("_LocationIndexer.__setitem__ refcount: ",sys.getrefcount(self.obj))
             if sys.getrefcount(self.obj) <= 2:
                 raise ChainedAssignmentError("Chained assignment doesn't work!!")
 

pandas/core/series.py

@@ -1074,11 +1074,8 @@ def _get_value(self, label, takeable: bool = False):
             return self.iloc[loc]
 
     def __setitem__(self, key, value) -> None:
-        if (
-            get_option("mode.copy_on_write")
-            and get_option("mode.data_manager") == "block"
-        ):
-            print("Series.__getitem__ refcount: ", sys.getrefcount(self))
+        if using_copy_on_write():
+            # print("Series.__getitem__ refcount: ", sys.getrefcount(self))
             if sys.getrefcount(self) <= 3:
                 raise ChainedAssignmentError("Chained assignment doesn't work!!")