Fix warnings in test_index.py

python/cudf/cudf/core/index.py

@@ -320,6 +320,12 @@ def copy(self, name=None, deep=False, dtype=None, names=None):
         -------
         New RangeIndex instance with same range, casted to new dtype
         """
+        if dtype is not None:
+            warnings.warn(
+                "parameter dtype is deprecated and will be removed in a "
+                "future version. Use the astype method instead.",
+                FutureWarning,
+            )
 
         dtype = self.dtype if dtype is None else dtype
 
@@ -583,6 +589,16 @@ def __array_ufunc__(self, ufunc, method, *inputs, **kwargs):
 
     @_cudf_nvtx_annotate
     def get_loc(self, key, method=None, tolerance=None):
+        # We should not actually remove this code until we have implemented the
+        # get_indexers method as an alternative, see
+        # https://github.com/rapidsai/cudf/issues/12312
+        if method is not None:
+            warnings.warn(
+                f"Passing method to {self.__class__.__name__}.get_loc is "
+                "deprecated and will raise in a future version.",
+                FutureWarning,
+            )
+
         # Given an actual integer,
         idx = (key - self._start) / self._step
         idx_int_upper_bound = (self._stop - self._start) // self._step
@@ -1116,6 +1132,12 @@ def copy(self, name=None, deep=False, dtype=None, names=None):
         -------
         New index instance, casted to new dtype
         """
+        if dtype is not None:
+            warnings.warn(
+                "parameter dtype is deprecated and will be removed in a "
+                "future version. Use the astype method instead.",
+                FutureWarning,
+            )
 
         dtype = self.dtype if dtype is None else dtype
         name = self.name if name is None else name
@@ -1169,9 +1191,18 @@ def get_loc(self, key, method=None, tolerance=None):
         >>> numeric_unique_index.get_loc(3)
         2
         """
+        # We should not actually remove this code until we have implemented the
+        # get_indexers method as an alternative, see
+        # https://github.com/rapidsai/cudf/issues/12312
+        if method is not None:
+            warnings.warn(
+                f"Passing method to {self.__class__.__name__}.get_loc is "
+                "deprecated and will raise in a future version.",
+                FutureWarning,
+            )
         if tolerance is not None:
             raise NotImplementedError(
-                "Parameter tolerance is unsupported yet."
+                "Parameter tolerance is not supported yet."
             )
         if method not in {
             None,
@@ -1555,6 +1586,12 @@ class NumericIndex(GenericIndex):
 
     @_cudf_nvtx_annotate
     def __init__(self, data=None, dtype=None, copy=False, name=None):
+        warnings.warn(
+            f"cudf.{self.__class__.__name__} is deprecated and will be "
+            "removed from cudf in a future version. Use cudf.Index with the "
+            "appropriate dtype instead.",
+            FutureWarning,
+        )
 
         dtype = type(self)._dtype
         if copy:

python/cudf/cudf/core/multiindex.py

@@ -1724,7 +1724,7 @@ def get_loc(self, key, method=None, tolerance=None):
         """
         if tolerance is not None:
             raise NotImplementedError(
-                "Parameter tolerance is unsupported yet."
+                "Parameter tolerance is not supported yet."
             )
         if method is not None:
             raise NotImplementedError(