move Identifiable to ml.util

Author: mengxr

python/pyspark/ml/param/__init__.py

@@ -15,24 +15,12 @@
 # limitations under the License.
 #
 
-import uuid
 from abc import ABCMeta
 
-__all__ = ['Param', 'Params']
-
-
-class Identifiable(object):
-    """
-    Object with a unique ID.
-    """
+from pyspark.ml.util import Identifiable
 
-    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
+__all__ = ['Param', 'Params']
 
 
 class Param(object):

python/pyspark/ml/util.py

@@ -15,6 +15,8 @@
 # limitations under the License.
 #
 
+import uuid
+
 
 def inherit_doc(cls):
     for name, func in vars(cls).items():
@@ -28,3 +30,17 @@ def inherit_doc(cls):
                     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