[SPARK-7488] [ML] Feature Parity in PySpark for ml.recommendation

Adds Python Api for `ALS` under `ml.recommendation` in PySpark. Also adds seed as a settable parameter in the Scala Implementation of ALS.

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #6015 from brkyvz/ml-rec and squashes the following commits:

be6e931 [Burak Yavuz] addressed comments
eaed879 [Burak Yavuz] readd numFeatures
0bd66b1 [Burak Yavuz] fixed seed
7f6d964 [Burak Yavuz] merged master
52e2bda [Burak Yavuz] added ALS

2 files changed, 31 insertions, 0 deletions

diff --git a/python/pyspark/ml/param/_shared_params_code_gen.py b/python/pyspark/ml/param/_shared_params_code_gen.py
index ee901f2584..ed3171b697 100644
--- a/python/pyspark/ml/param/_shared_params_code_gen.py
+++ b/python/pyspark/ml/param/_shared_params_code_gen.py
@@ -97,6 +97,8 @@ if __name__ == "__main__":
         ("inputCol", "input column name", None),
         ("inputCols", "input column names", None),
         ("outputCol", "output column name", None),
+        ("numFeatures", "number of features", None),
+        ("checkpointInterval", "checkpoint interval (>= 1)", None),
         ("seed", "random seed", None),
         ("tol", "the convergence tolerance for iterative algorithms", None),
         ("stepSize", "Step size to be used for each iteration of optimization.", None)]
diff --git a/python/pyspark/ml/param/shared.py b/python/pyspark/ml/param/shared.py
index 5e7529c1dc..d0bcadee22 100644
--- a/python/pyspark/ml/param/shared.py
+++ b/python/pyspark/ml/param/shared.py
@@ -310,6 +310,35 @@ class HasNumFeatures(Params):
         return self.getOrDefault(self.numFeatures)
 
 
+class HasCheckpointInterval(Params):
+    """
+    Mixin for param checkpointInterval: checkpoint interval (>= 1).
+    """
+
+    # a placeholder to make it appear in the generated doc
+    checkpointInterval = Param(Params._dummy(), "checkpointInterval", "checkpoint interval (>= 1)")
+
+    def __init__(self):
+        super(HasCheckpointInterval, self).__init__()
+        #: param for checkpoint interval (>= 1)
+        self.checkpointInterval = Param(self, "checkpointInterval", "checkpoint interval (>= 1)")
+        if None is not None:
+            self._setDefault(checkpointInterval=None)
+
+    def setCheckpointInterval(self, value):
+        """
+        Sets the value of :py:attr:`checkpointInterval`.
+        """
+        self.paramMap[self.checkpointInterval] = value
+        return self
+
+    def getCheckpointInterval(self):
+        """
+        Gets the value of checkpointInterval or its default value.
+        """
+        return self.getOrDefault(self.checkpointInterval)
+
+
 class HasSeed(Params):
     """
     Mixin for param seed: random seed.