def test_novel_deltas_macro(self):
asset_info = asset_infos[0][0]
base_dates = pd.DatetimeIndex([
pd.Timestamp('2014-01-01'),
pd.Timestamp('2014-01-04')
])
baseline = pd.DataFrame({
'value': (0, 1),
'asof_date': base_dates,
'timestamp': base_dates,
})
expr = bz.Data(baseline, name='expr', dshape=self.macro_dshape)
deltas = bz.Data(baseline, name='deltas', dshape=self.macro_dshape)
deltas = bz.transform(
deltas,
value=deltas.value + 10,
timestamp=deltas.timestamp + timedelta(days=1),
)
nassets = len(asset_info)
expected_views = keymap(pd.Timestamp, {
'2014-01-03': repeat_last_axis(
np.array([10.0, 10.0, 10.0]),
nassets,
),
'2014-01-06': repeat_last_axis(
np.array([10.0, 10.0, 11.0]),
nassets,
),
})
cal = pd.DatetimeIndex([
pd.Timestamp('2014-01-01'),
pd.Timestamp('2014-01-02'),
pd.Timestamp('2014-01-03'),
# omitting the 4th and 5th to simulate a weekend
pd.Timestamp('2014-01-06'),
])
with tmp_asset_finder(equities=asset_info) as finder:
expected_output = pd.DataFrame(
list(concatv([10] * nassets, [11] * nassets)),
index=pd.MultiIndex.from_product((
sorted(expected_views.keys()),
finder.retrieve_all(asset_info.index),
)),
columns=('value',),
)
self._run_pipeline(
expr,
deltas,
expected_views,
expected_output,
finder,
calendar=cal,
start=cal[2],
end=cal[-1],
window_length=3,
compute_fn=op.itemgetter(-1),
)
def _pipeline_output_index(dates, assets, mask):
"""
Create a MultiIndex for a pipeline output.
Parameters
----------
dates : pd.DatetimeIndex
Row labels for ``mask``.
assets : pd.Index
Column labels for ``mask``.
mask : np.ndarray[bool]
Mask array indicating date/asset pairs that should be included in
output index.
Returns
-------
index : pd.MultiIndex
MultiIndex containing (date, asset) pairs corresponding to ``True``
values in ``mask``.
"""
date_labels = repeat_last_axis(arange(len(dates)), len(assets))[mask]
asset_labels = repeat_first_axis(arange(len(assets)), len(dates))[mask]
return MultiIndex(
levels=[dates, assets],
labels=[date_labels, asset_labels],
# TODO: We should probably add names for these.
names=[None, None],
verify_integrity=False,
)
def test_deltas_macro(self):
asset_info = asset_infos[0][0]
expr = bz.Data(self.macro_df, name='expr', dshape=self.macro_dshape)
deltas = bz.Data(
self.macro_df.iloc[:-1],
name='deltas',
dshape=self.macro_dshape,
)
deltas = bz.transform(
deltas,
value=deltas.value + 10,
timestamp=deltas.timestamp + timedelta(days=1),
)
nassets = len(asset_info)
expected_views = keymap(
pd.Timestamp, {
'2014-01-02': repeat_last_axis(np.array([10.0, 1.0]), nassets),
'2014-01-03': repeat_last_axis(np.array([11.0, 2.0]), nassets),
})
with tmp_asset_finder(equities=asset_info) as finder:
expected_output = pd.DataFrame(
list(concatv([10] * nassets, [11] * nassets)),
index=pd.MultiIndex.from_product((
sorted(expected_views.keys()),
finder.retrieve_all(asset_info.index),
)),
columns=('value', ),
)
dates = self.dates
self._run_pipeline(
expr,
deltas,
expected_views,
expected_output,
finder,
calendar=dates,
start=dates[1],
end=dates[-1],
window_length=2,
compute_fn=np.nanmax,
)
def test_deltas_macro(self):
asset_info = asset_infos[0][0]
expr = bz.Data(self.macro_df, name='expr', dshape=self.macro_dshape)
deltas = bz.Data(
self.macro_df.iloc[:-1],
name='deltas',
dshape=self.macro_dshape,
)
deltas = bz.transform(
deltas,
value=deltas.value + 10,
timestamp=deltas.timestamp + timedelta(days=1),
)
nassets = len(asset_info)
expected_views = keymap(pd.Timestamp, {
'2014-01-02': repeat_last_axis(np.array([10.0, 1.0]), nassets),
'2014-01-03': repeat_last_axis(np.array([11.0, 2.0]), nassets),
})
with tmp_asset_finder(equities=asset_info) as finder:
expected_output = pd.DataFrame(
list(concatv([10] * nassets, [11] * nassets)),
index=pd.MultiIndex.from_product((
sorted(expected_views.keys()),
finder.retrieve_all(asset_info.index),
)),
columns=('value',),
)
dates = self.dates
self._run_pipeline(
expr,
deltas,
expected_views,
expected_output,
finder,
calendar=dates,
start=dates[1],
end=dates[-1],
window_length=2,
compute_fn=np.nanmax,
)
def _to_narrow(self, data, mask, dates, assets):
"""
Convert raw computed pipeline results into a DataFrame for public APIs.
Parameters
----------
data : dict[str -> ndarray[ndim=2]]
Dict mapping column names to computed results.
mask : ndarray[bool, ndim=2]
Mask array of values to keep.
dates : ndarray[datetime64, ndim=1]
Row index for arrays `data` and `mask`
assets : ndarray[int64, ndim=2]
Column index for arrays `data` and `mask`
Returns
-------
results : pd.DataFrame
The indices of `results` are as follows:
index : two-tiered MultiIndex of (date, asset).
Contains an entry for each (date, asset) pair corresponding to
a `True` value in `mask`.
columns : Index of str
One column per entry in `data`.
If mask[date, asset] is True, then result.loc[(date, asset), colname]
will contain the value of data[colname][date, asset].
"""
if not mask.any():
# Manually handle the empty DataFrame case. This is a workaround
# to pandas failing to tz_localize an empty dataframe with a
# MultiIndex. It also saves us the work of applying a known-empty
# mask to each array.
#
# Slicing `dates` here to preserve pandas metadata.
empty_dates = dates[:0]
empty_assets = array([], dtype=object)
return DataFrame(
data={
name: array([], dtype=arr.dtype)
for name, arr in iteritems(data)
},
index=MultiIndex.from_arrays([empty_dates, empty_assets]),
)
resolved_assets = array(self._finder.retrieve_all(assets))
dates_kept = repeat_last_axis(dates.values, len(assets))[mask]
assets_kept = repeat_first_axis(resolved_assets, len(dates))[mask]
return DataFrame(
data={name: arr[mask]
for name, arr in iteritems(data)},
index=MultiIndex.from_arrays([dates_kept, assets_kept]),
).tz_localize('UTC', level=0)
def compute(self, today, assets, out, close):
x_matrix = repeat_last_axis(
(self.window_length - 1) / 2 - self._x,
len(assets),
)
y_bar = np.nanmean(close, axis=0)
y_bars = repeat_first_axis(y_bar, self.window_length)
y_matrix = close - y_bars
out[:] = preprocess(-np.divide((x_matrix * y_matrix).sum(axis=0) /
self._x_var, self.window_length))
def _to_narrow(self, data, mask, dates, assets):
"""
Convert raw computed pipeline results into a DataFrame for public APIs.
Parameters
----------
data : dict[str -> ndarray[ndim=2]]
Dict mapping column names to computed results.
mask : ndarray[bool, ndim=2]
Mask array of values to keep.
dates : ndarray[datetime64, ndim=1]
Row index for arrays `data` and `mask`
assets : ndarray[int64, ndim=2]
Column index for arrays `data` and `mask`
Returns
-------
results : pd.DataFrame
The indices of `results` are as follows:
index : two-tiered MultiIndex of (date, asset).
Contains an entry for each (date, asset) pair corresponding to
a `True` value in `mask`.
columns : Index of str
One column per entry in `data`.
If mask[date, asset] is True, then result.loc[(date, asset), colname]
will contain the value of data[colname][date, asset].
"""
if not mask.any():
# Manually handle the empty DataFrame case. This is a workaround
# to pandas failing to tz_localize an empty dataframe with a
# MultiIndex. It also saves us the work of applying a known-empty
# mask to each array.
#
# Slicing `dates` here to preserve pandas metadata.
empty_dates = dates[:0]
empty_assets = array([], dtype=object)
return DataFrame(
data={
name: array([], dtype=arr.dtype)
for name, arr in iteritems(data)
},
index=MultiIndex.from_arrays([empty_dates, empty_assets]),
)
resolved_assets = array(self._finder.retrieve_all(assets))
dates_kept = repeat_last_axis(dates.values, len(assets))[mask]
assets_kept = repeat_first_axis(resolved_assets, len(dates))[mask]
return DataFrame(
data={name: arr[mask] for name, arr in iteritems(data)},
index=MultiIndex.from_arrays([dates_kept, assets_kept]),
).tz_localize('UTC', level=0)
def _to_narrow(self, data, mask, dates, assets):
"""
Convert raw computed pipeline results into a DataFrame for public APIs.
Parameters
----------
data : dict[str -> ndarray[ndim=2]]
Dict mapping column names to computed results.
mask : ndarray[bool, ndim=2]
Mask array of values to keep.
dates : ndarray[datetime64, ndim=1]
Row index for arrays `data` and `mask`
assets : ndarray[int64, ndim=2]
Column index for arrays `data` and `mask`
Returns
-------
results : pd.DataFrame
The indices of `results` are as follows:
index : two-tiered MultiIndex of (date, asset).
Contains an entry for each (date, asset) pair corresponding to
a `True` value in `mask`.
columns : Index of str
One column per entry in `data`.
If mask[date, asset] is True, then result.loc[(date, asset), colname]
will contain the value of data[colname][date, asset].
"""
resolved_assets = array(self._finder.retrieve_all(assets))
dates_kept = repeat_last_axis(dates.values, len(assets))[mask]
assets_kept = repeat_first_axis(resolved_assets, len(dates))[mask]
return DataFrame(
data={name: arr[mask]
for name, arr in iteritems(data)},
index=MultiIndex.from_arrays([dates_kept, assets_kept]),
).tz_localize('UTC', level=0)
def _to_narrow(self, data, mask, dates, assets):
"""
Convert raw computed pipeline results into a DataFrame for public APIs.
Parameters
----------
data : dict[str -> ndarray[ndim=2]]
Dict mapping column names to computed results.
mask : ndarray[bool, ndim=2]
Mask array of values to keep.
dates : ndarray[datetime64, ndim=1]
Row index for arrays `data` and `mask`
assets : ndarray[int64, ndim=2]
Column index for arrays `data` and `mask`
Returns
-------
results : pd.DataFrame
The indices of `results` are as follows:
index : two-tiered MultiIndex of (date, asset).
Contains an entry for each (date, asset) pair corresponding to
a `True` value in `mask`.
columns : Index of str
One column per entry in `data`.
If mask[date, asset] is True, then result.loc[(date, asset), colname]
will contain the value of data[colname][date, asset].
"""
resolved_assets = array(self._finder.retrieve_all(assets))
dates_kept = repeat_last_axis(dates.values, len(assets))[mask]
assets_kept = repeat_first_axis(resolved_assets, len(dates))[mask]
return DataFrame(
data={name: arr[mask] for name, arr in iteritems(data)},
index=MultiIndex.from_arrays([dates_kept, assets_kept]),
).tz_localize('UTC', level=0)
def test_novel_deltas_macro(self):
asset_info = asset_infos[0][0]
base_dates = pd.DatetimeIndex(
[pd.Timestamp('2014-01-01'),
pd.Timestamp('2014-01-04')])
baseline = pd.DataFrame({
'value': (0, 1),
'asof_date': base_dates,
'timestamp': base_dates,
})
expr = bz.Data(baseline, name='expr', dshape=self.macro_dshape)
deltas = bz.Data(baseline, name='deltas', dshape=self.macro_dshape)
deltas = bz.transform(
deltas,
value=deltas.value + 10,
timestamp=deltas.timestamp + timedelta(days=1),
)
nassets = len(asset_info)
expected_views = keymap(
pd.Timestamp, {
'2014-01-03':
repeat_last_axis(
np.array([10.0, 10.0, 10.0]),
nassets,
),
'2014-01-06':
repeat_last_axis(
np.array([10.0, 10.0, 11.0]),
nassets,
),
})
cal = pd.DatetimeIndex([
pd.Timestamp('2014-01-01'),
pd.Timestamp('2014-01-02'),
pd.Timestamp('2014-01-03'),
# omitting the 4th and 5th to simulate a weekend
pd.Timestamp('2014-01-06'),
])
with tmp_asset_finder(equities=asset_info) as finder:
expected_output = pd.DataFrame(
list(concatv([10] * nassets, [11] * nassets)),
index=pd.MultiIndex.from_product((
sorted(expected_views.keys()),
finder.retrieve_all(asset_info.index),
)),
columns=('value', ),
)
self._run_pipeline(
expr,
deltas,
expected_views,
expected_output,
finder,
calendar=cal,
start=cal[2],
end=cal[-1],
window_length=3,
compute_fn=op.itemgetter(-1),
)
