Add State Street holdings to the EquitiesFlow

I mean, I know it's all ETF's, but they have a lot of equities!

metrik/__init__.py

@@ -1,2 +1,2 @@
-__version__ = '0.3.9'
+__version__ = '0.4.0'
 __release__ = __version__

metrik/default.conf

@@ -9,3 +9,20 @@ consumer_key=
 consumer_secret=
 oauth_token=
 oauth_token_secret=
+
+[statestreet]
+etf_holdings:
+# Dow Jones
+  DIA,
+# Russell 1000, 2000, 3000
+  ONEK,TWOK,THRK,
+# S&P 500, small-cap, mid-cap, and growth
+  SPY,SLY,MDY,SPYG,
+# Sector-specific
+  XLY,XLP,XLE,XLF,XLFS,XLV,XLB,XLRE,XLK,XLU,
+# Smart-beta
+  SPYD,ONEV,ONEO,ONEY,SPYB,
+# Active ETFs
+  SYE,SYG,SYV,
+# Environmental, Social, Governance
+  LOWC,SPYX,SHE

metrik/flows/equities_flow.py

@@ -1,6 +1,8 @@
 from metrik.flows.base import Flow, MarketClose
 from metrik.tasks.nasdaq import NasdaqETFList, NasdaqCompanyList
 from metrik.tasks.tradeking import Tradeking1mTimesales
+from metrik.tasks.state_street import StateStreetHoldings
+from metrik.conf import get_config
 
 
 class EquitiesFlow(Flow):
@@ -12,6 +14,8 @@ class EquitiesFlow(Flow):
         return MarketClose()
 
     def _run(self):
+        config = get_config()
+
         # When we yield dependencies in `run` instead of `_requires`,
         # they get executed dynamically and we can use their results inline
         etfs = NasdaqETFList(current_datetime=self.present, live=self.live)
@@ -32,3 +36,11 @@ class EquitiesFlow(Flow):
             symbol=c['Symbol']
         ) for c in companies.output().retrieve()['companies']]
         yield tradeking_companies
+
+        state_street_etfs = config.get('statestreet', 'etf_holdings')
+        state_street_holdings = [
+            StateStreetHoldings(current_datetime=self.present, live=self.live,
+                                ticker=t.strip())
+            for t in state_street_etfs.split(',')
+        ]
+        yield state_street_holdings