Interchange dataframe protocol

python/cudf/cudf/__init__.py

@@ -42,7 +42,7 @@
     UInt64Index,
     interval_range,
 )
-from cudf.core.dataframe import DataFrame, from_pandas, merge
+from cudf.core.dataframe import DataFrame, from_pandas, merge, from_dataframe
 from cudf.core.series import Series
 from cudf.core.multiindex import MultiIndex
 from cudf.core.cut import cut

python/cudf/cudf/core/dataframe.py

@@ -40,7 +40,7 @@
     is_string_dtype,
     is_struct_dtype,
 )
-from cudf.core import column, reshape
+from cudf.core import column, reshape, df_protocol
 from cudf.core.abc import Serializable
 from cudf.core.column import (
     as_column,
@@ -7098,6 +7098,17 @@ def explode(self, column, ignore_index=False):
 
         return super()._explode(column, ignore_index)
 
+    def __dataframe__(
+        self, nan_as_null: bool = False, allow_copy: bool = True
+    ):
+        return df_protocol.__dataframe__(
+            self, nan_as_null=nan_as_null, allow_copy=allow_copy
+        )
+
+
+def from_dataframe(df, allow_copy=False):
+    return df_protocol.from_dataframe(df, allow_copy=allow_copy)
+
 
 def from_pandas(obj, nan_as_null=None):
     """