def __init__(self):
missing = []
if not HAVE_WIDGETS:
missing.append('ipywidgets')
elif not HAVE_IPYTHON:
missing.append('IPython')
if missing:
raise ValueError(
"IPythonWidgetProgressPublisher needs ipywidgets and IPython:"
"\nMissing:\n{}".format(bulleted_list(missing))
)
# Heading for progress display.
self._heading = ipywidgets.HTML()
# Percent Complete Indicator to the left of the bar.
indicator_width = '120px'
self._percent_indicator = ipywidgets.HTML(
layout={'width': indicator_width},
)
# The progress bar itself.
self._bar = ipywidgets.FloatProgress(
value=0.0,
min=0.0,
max=100.0,
bar_style='info',
# Leave enough space for the percent indicator.
layout={'width': 'calc(100% - {})'.format(indicator_width)},
)
bar_and_percent = ipywidgets.HBox([self._percent_indicator, self._bar])
# Collapsable details tab underneath the progress bar.
self._details_body = ipywidgets.HTML()
self._details_tab = ipywidgets.Accordion(
children=[self._details_body],
selected_index=None, # Start in collapsed state.
layout={
# Override default border settings to make details tab less
# heavy.
'border': '1px',
},
)
# There's no public interface for setting title in the constructor :/.
self._details_tab.set_title(0, 'Details')
# Container for the combined widget.
self._layout = ProgressBarContainer(
[
self._heading,
bar_and_percent,
self._details_tab,
],
# Overall layout consumes 75% of the page.
layout={'width': '75%'},
)
self._displayed = False
def _ensure_can_load(self, loader, terms):
"""Ensure that ``loader`` can load ``terms``."""
if not loader.currency_aware:
bad = [t for t in terms if t.currency_conversion is not None]
if bad:
raise ValueError(
"Requested currency conversion is not supported for the "
"following terms:\n{}".format(bulleted_list(bad)))
def get_column(cls, name):
"""Look up a column by name.
Parameters
----------
name : str
Name of the column to look up.
Returns
-------
column : zipline.pipeline.data.BoundColumn
Column with the given name.
Raises
------
AttributeError
If no column with the given name exists.
"""
clsdict = vars(cls)
try:
maybe_column = clsdict[name]
if not isinstance(maybe_column, _BoundColumnDescr):
raise KeyError(name)
except KeyError:
raise AttributeError(
"{dset} has no column {colname!r}:\n\n"
"Possible choices are:\n"
"{choices}".format(
dset=cls.qualname,
colname=name,
choices=bulleted_list(
sorted(cls._column_names),
max_count=10,
),
)
)
# Resolve column descriptor into a BoundColumn.
return maybe_column.__get__(None, cls)
def get_column(cls, name):
"""Look up a column by name.
Parameters
----------
name : str
Name of the column to look up.
Returns
-------
column : zipline.pipeline.data.BoundColumn
Column with the given name.
Raises
------
AttributeError
If no column with the given name exists.
"""
clsdict = vars(cls)
try:
maybe_column = clsdict[name]
if not isinstance(maybe_column, _BoundColumnDescr):
raise KeyError(name)
except KeyError:
raise AttributeError(
"{dset} has no column {colname!r}:\n\n"
"Possible choices are:\n"
"{choices}".format(
dset=cls.qualname,
colname=name,
choices=bulleted_list(
sorted(cls._column_names),
max_count=10,
),
)
)
# Resolve column descriptor into a BoundColumn.
return maybe_column.__get__(None, cls)
