ENH: Remove need to pass sid to TALib transform constructor.

Now that BatchTransforms use RollingPanels under the hood, passing
an sid is no longer needed, passing the data will to handle_data
will suffice.

tests/test_transforms.py

@@ -344,8 +344,8 @@ class TestTALIB(TestCase):
                 # factory.create_test_panel_ohlc_source(self.sim_params)
 
     def test_multiple_talib_with_args(self):
-        zipline_transforms = [ta.MA(0, window_length=10),
-                              ta.MA(0, window_length=25)]
+        zipline_transforms = [ta.MA(window_length=10),
+                              ta.MA(window_length=25)]
         talib_fn = talib.abstract.MA
         algo = TALIBAlgorithm(talib=zipline_transforms)
         algo.run(self.source)

zipline/transforms/ta.py

@@ -56,8 +56,7 @@ def make_transform(talib_fn, name):
         --------
 
         A moving average of a data column called 'Oil' with timeperiod 5,
-        for sid 'XYZ':
-            talib.transforms.ta.MA('XYZ', close='Oil', timeperiod=5)
+            talib.transforms.ta.MA(close='Oil', timeperiod=5)
 
         The user could find the default arguments and mappings by calling:
             help(zipline.transforms.ta.MA)
@@ -66,8 +65,6 @@ def make_transform(talib_fn, name):
         Arguments
         ---------
 
-        sid : zipline sid
-
         open   : string, default 'open'
         high   : string, default 'high'
         low    : string, default 'low'
@@ -83,7 +80,6 @@ def make_transform(talib_fn, name):
         """
 
         def __init__(self,
-                     sid,
                      close='price',
                      open='open',
                      high='high',
@@ -160,7 +156,6 @@ def make_transform(talib_fn, name):
 
             super(TALibTransform, self).__init__(
                 func=zipline_wrapper,
-                sids=sid,
                 refresh_period=refresh_period,
                 window_length=max(1, self.lookback + 1))