Ship Modin with Ray. (#3109)

python/ray/__init__.py

@@ -46,6 +46,9 @@ except ImportError as e:
             e.args += (helpful_message, )
     raise
 
+modin_path = os.path.join(os.path.abspath(os.path.dirname(__file__)), "modin")
+sys.path.insert(0, modin_path)
+
 from ray.raylet import ObjectID, _config  # noqa: E402
 from ray.profiling import profile  # noqa: E402
 from ray.worker import (error_info, init, connect, disconnect, get, put, wait,

python/ray/test/test_modin.py

@@ -0,0 +1,12 @@
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import ray  # noqa F401
+
+
+def test_modin_import():
+    import modin.pandas as pd
+    frame_data = [1, 2, 3, 4, 5, 6, 7, 8]
+    frame = pd.DataFrame(frame_data)
+    assert frame.sum().squeeze() == sum(frame_data)