1 files changed, 46 insertions, 0 deletions
diff --git a/python/pyspark/ml/util.py b/python/pyspark/ml/util.py
new file mode 100644
index 0000000000..b1caa84b63
--- /dev/null
+++ b/python/pyspark/ml/util.py
@@ -0,0 +1,46 @@
+#
+# 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.
+#
+
+import uuid
+
+
+def inherit_doc(cls):
+    for name, func in vars(cls).items():
+        # only inherit docstring for public functions
+        if name.startswith("_"):
+            continue
+        if not func.__doc__:
+            for parent in cls.__bases__:
+                parent_func = getattr(parent, name, None)
+                if parent_func and getattr(parent_func, "__doc__", None):
+                    func.__doc__ = parent_func.__doc__
+                    break
+    return cls
+
+
+class Identifiable(object):
+    """
+    Object with a unique ID.
+    """
+
+    def __init__(self):
+        #: A unique id for the object. The default implementation
+        #: concatenates the class name, "-", and 8 random hex chars.
+        self.uid = type(self).__name__ + "-" + uuid.uuid4().hex[:8]
+
+    def __repr__(self):
+        return self.uid