| <!-- |
| ~ 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. |
| --> |
| |
| <html> |
| <h2>Combine - Simple Function</h2> |
| <p>Combine is a Beam transform for combining collections of elements or values in your data. |
| When you apply a Combine transform, you must provide the function that contains the logic for |
| combining the elements or values. The combining function should be commutative and associative, |
| as the function is not necessarily invoked exactly once on all values with a given key. Because |
| the input data (including the value collection) may be distributed across multiple workers, the |
| combining function might be called multiple times to perform partial combining on subsets of |
| the value collection.</p> |
| <p>Simple combine operations, such as sums, can usually be implemented as a simple function.</p> |
| <p>In this task, we are going to implement the summation of numbers using |
| <a href="https://beam.apache.org/releases/pydoc/2.11.0/apache_beam.transforms.core.html#apache_beam.transforms.core.CombineGlobally"> |
| CombineGlobally</a>. |
| </p> |
| <br> |
| <br> |
| <div class="hint"> |
| Implement a simple Python function that performs the summation of the values. |
| </div> |
| </html> |
