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# Ewoks: Extensible Workflow System
Many [workflow management systems](https://s.apache.org/existing-workflow-systems) exist to deal with data processing problems that can be expressed as a graph of tasks, also referred to as a *computational graph* or *workflow*. The main purpose of a workflow management system is to provide a framework for implementing tasks, creating graphs of tasks and executing these graphs.
The purpose of *ewoks* is to provide an abstraction layer between graph representation and execution. This allows using the same tasks and graphs in different workflow management systems. *ewoks* itself is **not** a workflow management system.
## Install
```bash
pip install ewoks[orange,dask,ppf,test]
```
## Test
```bash
pytest --pyargs ewoks.tests
```
## Getting started
Workflows can be executed from the command line
```bash
ewoks execute /path/to/graph.json [--engine dask]
```
or for an installation with the system python
```bash
python3 -m ewoks execute /path/to/graph.json [--engine dask]
```
Workflows can also be executed from python
```python
from ewoks import execute_graph
result = execute_graph("/path/to/graph.json", engine="dask")
```
When no engine is specified it will use sequential execution from `ewokscore`.
## Documentation
https://ewoks.readthedocs.io/
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