MAINT: Added script to generate new sample saved state.

This will be used for testing versioning. By having saved state
generated by each code version, we can ensure that the version
logic is correct.

scripts/generate_new_sample_saved_state.py

@@ -0,0 +1,138 @@
+#
+# Copyright 2015 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import datetime
+import os
+import pickle
+import pytz
+
+import sys
+sys.path.insert(0, '.')
+
+from zipline.finance.blotter import Blotter, Order
+from zipline.finance.commission import PerShare, PerTrade, PerDollar
+from zipline.finance.performance.period import PerformancePeriod
+from zipline.finance.performance.position import Position
+from zipline.finance.performance.tracker import PerformanceTracker
+from zipline.finance.risk.cumulative import RiskMetricsCumulative
+from zipline.finance.risk.period import RiskMetricsPeriod
+from zipline.finance.risk.report import RiskReport
+from zipline.finance.slippage import (
+    FixedSlippage,
+    Transaction,
+    VolumeShareSlippage
+)
+from zipline.protocol import Account
+from zipline.protocol import Portfolio
+from zipline.protocol import Position as ProtocolPosition
+
+
+from zipline.finance.trading import SimulationParameters
+
+from zipline.utils import factory
+from zipline.utils.serialization_utils import VERSION_LABEL
+
+base_state_dir = 'tests/resources/saved_state_archive'
+if not os.path.exists(base_state_dir):
+    os.makedirs(base_state_dir)
+
+
+sim_params_daily = SimulationParameters(
+    datetime.datetime(2013, 6, 19, tzinfo=pytz.UTC),
+    datetime.datetime(2013, 6, 19, tzinfo=pytz.UTC),
+    10000,
+    emission_rate='daily')
+
+
+sim_params_minute = SimulationParameters(
+    datetime.datetime(2013, 6, 19, tzinfo=pytz.UTC),
+    datetime.datetime(2013, 6, 19, tzinfo=pytz.UTC),
+    10000,
+    emission_rate='minute')
+
+
+returns = factory.create_returns_from_list(
+    [1.0], sim_params_daily)
+
+
+argument_list = [
+    (Blotter, ()),
+    (Order, (datetime.datetime(2013, 6, 19), 8554, 100)),
+    (PerShare, ()),
+    (PerTrade, ()),
+    (PerDollar, ()),
+    (PerformancePeriod, (10000,)),
+    (Position, (8554,)),
+    (PerformanceTracker, (sim_params_daily,)),
+    (PerformanceTracker, (sim_params_minute,)),
+    (RiskMetricsCumulative, (sim_params_daily,)),
+    (RiskMetricsCumulative, (sim_params_minute,)),
+    (RiskMetricsPeriod, (returns.index[0], returns.index[0], returns)),
+    (RiskReport, (returns, sim_params_daily)),
+    (RiskReport, (returns, sim_params_minute)),
+    (FixedSlippage, ()),
+    (Transaction, (8554, 10, datetime.datetime(2013, 6, 19), 100, "0000")),
+    (VolumeShareSlippage, ()),
+    (Account, ()),
+    (Portfolio, ()),
+    (ProtocolPosition, (8554,))
+]
+
+
+def write_state_to_disk(cls, state):
+    state_dir = cls.__module__ + cls.__name__
+
+    full_dir = base_state_dir + '/' + state_dir
+
+    if not os.path.exists(full_dir):
+        os.makedirs(full_dir)
+
+    name = 'State_Version_' + str(state['obj_state'][VERSION_LABEL])
+
+    full_path = full_dir + '/' + name
+
+    f = open(full_path, 'w')
+
+    pickle.dump(state, f)
+
+    f.close()
+
+
+def generate_object_state(cls, initargs):
+
+    obj = cls(*initargs)
+    state = obj.__getstate__()
+    if hasattr(obj, '__getinitargs__'):
+        initargs = obj.__getinitargs__()
+    else:
+        initargs = None
+    if hasattr(obj, '__getnewargs__'):
+        newargs = obj.__getnewargs__()
+    else:
+        newargs = None
+
+    on_disk_state = {
+        'obj_state': state,
+        'initargs': initargs,
+        'newargs': newargs
+    }
+
+    write_state_to_disk(cls, on_disk_state)
+
+
+if __name__ == "__main__":
+
+    for args in argument_list:
+        generate_object_state(*args)