[REVIEW]Porter Stemmer

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## New Features
 - PR #2677: Ability to export RF trees as JSON
 - PR #2698: Distributed TF-IDF transformer
+- PR #2476: Porter Stemmer
 - PR #2789: Dask LabelEncoder
 - PR #2152: add FIL C++ benchmark
 - PR #2638: Improve cython build with custom `build_ext`

docs/source/api.rst

@@ -73,6 +73,12 @@ Feature and Label Encoding (Single-GPU)
  .. autoclass:: cuml.preprocessing.TargetEncoder
     :members:
 
+
+Text Preprocessing (Single-GPU)
+---------------------------------------
+ .. autoclass:: cuml.preprocessing.text.stem.PorterStemmer
+    :members:
+
 Feature and Label Encoding (Dask-based Multi-GPU)
 -------------------------------------------------
 

python/cuml/preprocessing/__init__.py

@@ -18,3 +18,4 @@
 from cuml.preprocessing.label import LabelBinarizer, label_binarize
 from cuml.preprocessing.encoders import OneHotEncoder
 from cuml.preprocessing.TargetEncoder import TargetEncoder
+from cuml.preprocessing import text

python/cuml/preprocessing/text/__init__.py

@@ -0,0 +1,17 @@
+#
+# Copyright (c) 2020, NVIDIA CORPORATION.
+#
+# Licensed 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.
+#
+
+from cuml.preprocessing.text import stem

python/cuml/preprocessing/text/stem/__init__.py

@@ -0,0 +1,18 @@
+#
+# Copyright (c) 2020, NVIDIA CORPORATION.
+#
+# Licensed 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.
+#
+
+from cuml.preprocessing.text.stem.porter_stemmer import PorterStemmer
+import cuml.preprocessing.text.stem.porter_stemmer_utils