Deprecated / Pending Deprecation

Dataset.drop([labels, dim, errors])	Backward compatible method based on drop_vars and drop_sel
DataArray.drop([labels, dim, errors])	Backward compatible method based on drop_vars and drop_sel
Dataset.apply(func[, keep_attrs, args])	Backward compatible implementation of map
core.groupby.DataArrayGroupBy.apply(func[, ...])	Backward compatible implementation of map
core.groupby.DatasetGroupBy.apply(func[, ...])	Backward compatible implementation of map

DataArray.dt.weekofyear	The week ordinal of the year
DataArray.dt.week	The week ordinal of the year