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| .. 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 |
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| .. http://www.apache.org/licenses/LICENSE-2.0 |
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| .. software distributed under the License is distributed on an |
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| |
| Operation Node |
| ============== |
| |
| .. todo |
| The explanation for overloade methods seems weird and does not really describe which |
| methods we mean (magic methods for operators like `+`, `*` etc.). |
| Also I don't understand why that would mean that they return an ``OpeartionNode``. |
| |
| An ``OperationNode`` represents an operation that executes in SystemDS. |
| Most methods are overloaded for ``OperationNode``. |
| This means that they return an ``OperationNode``. |
| |
| To get the result from an ``OperationNode`` you simply call ``.compute()`` on it, thereby getting the numpy equivalent result. |
| Even comparisons like ``__eq__``, ``__lt__`` etc. return ``OperationNode``. |
| |
| .. note:: |
| |
| All operations are lazily evaluated, meaning before calling ``.compute()`` nothing will be executed in SystemDS. |
| Therefore errors will not immediately be recognized while constructing an sequence of operators. |
| |
| .. autoclass:: systemds.operator.OperationNode |
| :members: |
| |
| .. automethod:: __init__ |