Add deprecation warning

Author: timsaucer

python/datafusion/html_formatter.py

@@ -0,0 +1,29 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Deprecated module for dataframe formatting."""
+
+import warnings
+
+from datafusion.dataframe_formatter import *  # noqa: F403
+
+warnings.warn(
+    "The module 'html_formatter' is deprecated and will be removed in the next release."
+    "Please use 'dataframe_formatter' instead.",
+    DeprecationWarning,
+    stacklevel=2,
+)