本文整理汇总了Python中urbansim.datasets.dataset.Dataset._compute_if_needed方法的典型用法代码示例。如果您正苦于以下问题：Python Dataset._compute_if_needed方法的具体用法？Python Dataset._compute_if_needed怎么用？Python Dataset._compute_if_needed使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类urbansim.datasets.dataset.Dataset的用法示例。
在下文中一共展示了Dataset._compute_if_needed方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: _compute_if_needed
# 需要导入模块: from urbansim.datasets.dataset import Dataset [as 别名]
# 或者: from urbansim.datasets.dataset.Dataset import _compute_if_needed [as 别名]
def _compute_if_needed(self, name, dataset_pool, resources=None, quiet=False, version=None):
""" Compute variable given by the argument 'name' only if this variable
has not been computed before.
Check first if this variable belongs to dataset1 or dataset2.
dataset_pool holds available datasets.
"""
if not isinstance(name, VariableName):
variable_name = VariableName(name)
else:
variable_name = name
short_name = variable_name.get_alias()
dataset_name = variable_name.get_dataset_name()
if dataset_name == self.get_dataset_name():
new_version = UrbansimDataset._compute_if_needed(self, variable_name, dataset_pool, resources, quiet=quiet, version=version)
else:
if dataset_name == self.dataset1.get_dataset_name():
owner_dataset = self.dataset1
# index = self.get_2d_index_of_dataset1()
elif dataset_name == self.dataset2.get_dataset_name():
owner_dataset = self.dataset2
# index = self.get_2d_index()
else:
self._raise_error(StandardError, "Cannot find variable '%s'\nin either dataset or in the interaction set." %
variable_name.get_expression())
owner_dataset.compute_variables([variable_name], dataset_pool, resources=resources, quiet=True)
new_version = self.compute_variables_return_versions_and_final_value("%s = %s.disaggregate(%s.%s)" % \
( short_name, self.get_dataset_name(), owner_dataset.get_dataset_name(), short_name ),
dataset_pool=dataset_pool, resources=resources, quiet=quiet )[0]
return new_version