MAINT: Use loc instead of deprecated ix

tests/metrics/test_metrics.py

@@ -1,5 +1,4 @@
 import unittest
-import warnings
 
 import numpy as np
 import pandas as pd
@@ -117,11 +116,7 @@ def init_class_fixtures(cls):
         cls.closes.name = None
 
     def test_nop(self):
-        # Filter out pandas `ix` DeprecationWarning causing tests to fail
-        with warnings.catch_warnings():
-            warnings.simplefilter("ignore", DeprecationWarning)
-
-            perf = self.run_algorithm()
+        perf = self.run_algorithm()
 
         zeros = pd.Series(0.0, index=self.closes)
         all_zero_fields = [
@@ -451,13 +446,10 @@ def handle_data(context, data):
             check_portfolio(context)
             context.bar_count += 1
 
-        # Filter out pandas `ix` DeprecationWarning causing tests to fail
-        with warnings.catch_warnings():
-            warnings.simplefilter("ignore", DeprecationWarning)
-            perf = self.run_algorithm(
-                initialize=initialize,
-                handle_data=handle_data,
-            )
+        perf = self.run_algorithm(
+            initialize=initialize,
+            handle_data=handle_data,
+        )
 
         first_day_returns = -(
             abs(per_fill_commission.sum()) / self.SIM_PARAMS_CAPITAL_BASE
@@ -608,13 +600,10 @@ def handle_data(context, data):
             # the portfolio on the bar of the order, only the following bars
             check_portfolio(context, first_bar)
 
-        # Filter out pandas `ix` DeprecationWarning causing tests to fail
-        with warnings.catch_warnings():
-            warnings.simplefilter("ignore", DeprecationWarning)
-            perf = self.run_algorithm(
-                initialize=initialize,
-                handle_data=handle_data,
-            )
+        perf = self.run_algorithm(
+            initialize=initialize,
+            handle_data=handle_data,
+        )
 
         zeros = pd.Series(0.0, index=self.closes)
         all_zero_fields = [
@@ -1026,13 +1015,10 @@ def handle_data(context, data):
             # the portfolio on the bar of the order, only the following bars
             check_portfolio(context, first_bar)
 
-        # Filter out pandas `ix` DeprecationWarning causing tests to fail
-        with warnings.catch_warnings():
-            warnings.simplefilter("ignore", DeprecationWarning)
-            perf = self.run_algorithm(
-                initialize=initialize,
-                handle_data=handle_data,
-            )
+        perf = self.run_algorithm(
+            initialize=initialize,
+            handle_data=handle_data,
+        )
 
         zeros = pd.Series(0.0, index=self.closes)
         all_zero_fields = [
@@ -1585,14 +1571,10 @@ def handle_data(context, data):
             # the portfolio on the bar of the order, only the following bars
             check_portfolio(data, context, first_bar)
 
-        # Filter out pandas `ix` DeprecationWarning causing tests to fail
-        with warnings.catch_warnings():
-            warnings.simplefilter("ignore", DeprecationWarning)
-
-            perf = self.run_algorithm(
-                initialize=initialize,
-                handle_data=handle_data,
-            )
+        perf = self.run_algorithm(
+            initialize=initialize,
+            handle_data=handle_data,
+        )
 
         zeros = pd.Series(0.0, index=self.equity_closes)
         all_zero_fields = [
@@ -2006,16 +1988,12 @@ def handle_data(context, data):
             # the portfolio on the bar of the order, only the following bars
             check_portfolio(data, context, first_bar)
 
-        # Filter out pandas `ix` DeprecationWarning causing tests to fail
-        with warnings.catch_warnings():
-            warnings.simplefilter("ignore", DeprecationWarning)
-
-            perf = self.run_algorithm(
-                initialize=initialize,
-                handle_data=handle_data,
-                trading_calendar=self.trading_calendars[Future],
-                data_portal=self.futures_data_portal,
-            )
+        perf = self.run_algorithm(
+            initialize=initialize,
+            handle_data=handle_data,
+            trading_calendar=self.trading_calendars[Future],
+            data_portal=self.futures_data_portal,
+        )
 
         zeros = pd.Series(0.0, index=self.future_closes)
         all_zero_fields = [

zipline/algorithm.py

@@ -490,7 +490,7 @@ def _create_clock(self):
         """
         If the clock property is not set, then create one based on frequency.
         """
-        trading_o_and_c = self.trading_calendar.schedule.ix[
+        trading_o_and_c = self.trading_calendar.schedule.loc[
             self.sim_params.sessions]
         market_closes = trading_o_and_c['market_close']
         minutely_emission = False