def previous(task):
"""
Return a previous Task of the same family.
By default checks if this task family only has one non-global parameter and if
it is a DateParameter, DateHourParameter or DateIntervalParameter in which case
it returns with the time decremented by 1 (hour, day or interval)
"""
params = task.get_params()
previous_params = {}
previous_date_params = {}
for param_name, param_obj in params:
param_value = getattr(task, param_name)
if isinstance(param_obj, parameter.DateParameter):
previous_date_params[param_name] = param_value - datetime.timedelta(days=1)
elif isinstance(param_obj, parameter.DateMinuteParameter):
previous_date_params[param_name] = param_value - datetime.timedelta(minutes=1)
elif isinstance(param_obj, parameter.DateHourParameter):
previous_date_params[param_name] = param_value - datetime.timedelta(hours=1)
elif isinstance(param_obj, parameter.DateIntervalParameter):
previous_date_params[param_name] = param_value.prev()
else:
previous_params[param_name] = param_value
previous_params.update(previous_date_params)
if len(previous_date_params) == 0:
raise NotImplementedError("No task parameter - can't determine previous task")
elif len(previous_date_params) > 1:
raise NotImplementedError("Too many date-related task parameters - can't determine previous task")
else:
return task.clone(**previous_params)
def previous(task):
"""
Return a previous Task of the same family.
By default checks if this task family only has one non-global parameter and if
it is a DateParameter, DateHourParameter or DateIntervalParameter in which case
it returns with the time decremented by 1 (hour, day or interval)
"""
params = task.get_params()
previous_params = {}
previous_date_params = {}
for param_name, param_obj in params:
param_value = getattr(task, param_name)
if isinstance(param_obj, parameter.DateParameter):
previous_date_params[param_name] = param_value - datetime.timedelta(days=1)
elif isinstance(param_obj, parameter.DateMinuteParameter):
previous_date_params[param_name] = param_value - datetime.timedelta(minutes=1)
elif isinstance(param_obj, parameter.DateHourParameter):
previous_date_params[param_name] = param_value - datetime.timedelta(hours=1)
elif isinstance(param_obj, parameter.DateIntervalParameter):
previous_date_params[param_name] = param_value.prev()
else:
previous_params[param_name] = param_value
previous_params.update(previous_date_params)
if len(previous_date_params) == 0:
raise NotImplementedError("No task parameter - can't determine previous task")
elif len(previous_date_params) > 1:
raise NotImplementedError("Too many date-related task parameters - can't determine previous task")
else:
return task.clone(**previous_params)