| <!-- | |
| Licensed to the Apache Software Foundation (ASF) under one | |
| or more contributor license agreements. See the NOTICE file | |
| distributed with this work for additional information | |
| regarding copyright ownership. The ASF licenses this file | |
| to you under the Apache License, Version 2.0 (the | |
| "License"); you may not use this file except in compliance | |
| with the License. You may obtain a copy of the License at | |
| http://www.apache.org/licenses/LICENSE-2.0 | |
| Unless required by applicable law or agreed to in writing, | |
| software distributed under the License is distributed on an | |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
| KIND, either express or implied. See the License for the | |
| specific language governing permissions and limitations | |
| under the License. | |
| --> | |
| # subdag operator | |
| This README demonstrates the use of the subdag operator. | |
| The subdag operator allows you to effectively run a driver within a node. | |
| In this case, we are calculating unique website visitors from the following set of parameters: | |
| 1. Region = CA (canada) or US (United States) | |
| 2. Granularity of data = (day, week, month) | |
| You can find the code in [unique_users.py](unique_users.py) and [reusable_subdags.py](reusable_subdags.py) | |
| and look at how we run it in [main.py](main.py). | |
| # Visualizing Execution | |
| Here you can see the resulting shape of the DAG that will be executed: | |
|  |