From f474ee7eed25efa3f9a2d15f5d35d58599b1da54 Mon Sep 17 00:00:00 2001
From: Thomas Wiecki <thomas.wiecki@gmail.com>
Date: Mon, 29 Dec 2014 11:36:44 +0100
Subject: [PATCH] BUG: Various functions were missing from the API.

---
 zipline/algorithm.py | 11 +++++++++--
 zipline/api.py       |  8 +++++++-
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/zipline/algorithm.py b/zipline/algorithm.py
index a28e553e..349741ee 100644
--- a/zipline/algorithm.py
+++ b/zipline/algorithm.py
@@ -608,14 +608,21 @@ class TradingAlgorithm(object):
             self._recorded_vars[name] = value
 
     @api_method
-    def symbol(self, symbol_str, as_of_date=None):
+    def symbol(self, symbol_str):
         """
         Default symbol lookup for any source that directly maps the
         symbol to the identifier (e.g. yahoo finance).
-        Keyword argument as_of_date is ignored.
         """
         return symbol_str
 
+    @api_method
+    def symbols(self, *args):
+        """
+        Default symbols lookup for any source that directly maps the
+        symbol to the identifier (e.g. yahoo finance).
+        """
+        return args
+
     @api_method
     def order(self, sid, amount,
               limit_price=None,
diff --git a/zipline/api.py b/zipline/api.py
index 017efa76..6c94073b 100644
--- a/zipline/api.py
+++ b/zipline/api.py
@@ -26,6 +26,10 @@ from zipline.finance.slippage import (
     VolumeShareSlippage,
 )
 
+from zipline.utils.events import (
+    date_rules,
+    time_rules
+)
 
 batch_transform = zipline.transforms.BatchTransform
 
@@ -37,5 +41,7 @@ __all__ = [
     'math_utils',
     'batch_transform',
     'FixedSlippage',
-    'VolumeShareSlippage'
+    'VolumeShareSlippage',
+    'date_rules',
+    'time_rules'
 ]