use _holds_integer in plotting._atplotlib.core.py

Author: Terji Petersen

pandas/plotting/_matplotlib/core.py

@@ -1194,7 +1194,7 @@ def __init__(self, data, x, y, s=None, c=None, **kwargs) -> None:
         elif is_hashable(s) and s in data.columns:
             s = data[s]
         super().__init__(data, x, y, s=s, **kwargs)
-        if is_integer(c) and self.data.columns._should_fallback_to_positional:
+        if is_integer(c) and self.data.columns._holds_integer():
             c = self.data.columns[c]
         self.c = c
 
@@ -1286,7 +1286,7 @@ def _kind(self) -> Literal["hexbin"]:
 
     def __init__(self, data, x, y, C=None, **kwargs) -> None:
         super().__init__(data, x, y, **kwargs)
-        if is_integer(C) and self.data.columns._should_fallback_to_positional:
+        if is_integer(C) and self.data.columns._holds_integer():
             C = self.data.columns[C]
         self.C = C