def get_calendar(self, name='SZSH'):
"""
Retrieves an instance of an TradingCalendar whose name is given.
Parameters
----------
name : str
The name of the TradingCalendar to be retrieved.
Returns
-------
calendar : zipline.utils.calendars.TradingCalendar
The desired calendar.
"""
canonical_name = self.resolve_alias(name)
try:
return self._calendars[canonical_name]
except KeyError:
# We haven't loaded this calendar yet, so make a new one.
pass
try:
factory = self._calendar_factories[canonical_name]
except KeyError:
# We don't have a factory registered for this name. Barf.
raise InvalidCalendarName(calendar_name=name)
# Cache the calendar for future use.
calendar = self._calendars[canonical_name] = factory()
return calendar
def get_calendar(self, name):
"""
Retrieves an instance of an TradingCalendar whose name is given.
Parameters
----------
name : str
The name of the TradingCalendar to be retrieved.
Returns
-------
TradingCalendar
The desired calendar.
"""
try:
return self._calendars[name]
except KeyError:
pass
for names, factory in self._calendar_factories.items():
if name in names:
# Use the same calendar for all exchanges that share the same
# factory.
calendar = factory()
self._calendars.update({n: calendar for n in names})
return calendar
raise InvalidCalendarName(calendar_name=name)
def get_calendar(name):
"""
Retrieves an instance of an TradingCalendar whose name is given.
Parameters
----------
name : str
The name of the TradingCalendar to be retrieved.
Returns
-------
TradingCalendar
The desired calendar.
"""
if name not in _static_calendars:
if name == 'NYSE':
cal = NYSEExchangeCalendar()
elif name == 'CME':
cal = CMEExchangeCalendar()
elif name == 'BMF':
cal = BMFExchangeCalendar()
elif name == 'LSE':
cal = LSEExchangeCalendar()
elif name == 'TSX':
cal = TSXExchangeCalendar()
elif name == "ICE":
cal = ICEExchangeCalendar()
elif name == "CFE":
cal = CFEExchangeCalendar()
else:
raise InvalidCalendarName(calendar_name=name)
register_calendar(cal)
return _static_calendars[name]
def get_calendar(name):
"""
Retrieves an instance of an ExchangeCalendar whose name is given.
Parameters
----------
name : str
The name of the ExchangeCalendar to be retrieved.
"""
# First, check if the calendar is already registered
if name not in _static_calendars:
# Check if it is a lazy calendar. If so, build and register it.
if name == 'NYSE':
from zipline.utils.calendars.exchange_calendar_nyse \
import NYSEExchangeCalendar
nyse_cal = NYSEExchangeCalendar()
register_calendar(nyse_cal)
elif name == 'CME':
from zipline.utils.calendars.exchange_calendar_cme \
import CMEExchangeCalendar
cme_cal = CMEExchangeCalendar()
register_calendar(cme_cal)
elif name == 'BMF':
from zipline.utils.calendars.exchange_calendar_bmf \
import BMFExchangeCalendar
bmf_cal = BMFExchangeCalendar()
register_calendar(bmf_cal)
elif name == 'LSE':
from zipline.utils.calendars.exchange_calendar_lse \
import LSEExchangeCalendar
lse_cal = LSEExchangeCalendar()
register_calendar(lse_cal)
elif name == 'TSX':
from zipline.utils.calendars.exchange_calendar_tsx \
import TSXExchangeCalendar
tsx_cal = TSXExchangeCalendar()
register_calendar(tsx_cal)
else:
# It's not a lazy calendar, so raise an exception
raise InvalidCalendarName(calendar_name=name)
return _static_calendars[name]