Backend requirements

It is assumed that the following is installed on your system:

Python 3.6 or higher: https://www.python.org/downloads/
pip:
- Windows: The Python installers for Windows include pip. You can make sure that pip is up-to-date by running:
```
py -m pip install --upgrade pip
py -m pip --version
```
- Unix/MacOS: Debian and most other distributions include a python-pip package. You can also install pip yourself to ensure you have the latest version by running:
```
python3 -m pip install --user --upgrade pip
python3 -m pip --version
```
venv: keeps your environments clean by keeping the dependencies in a specific directory for your project. You can install virtualenv by running:
- Windows:
```
py -m pip install --user virtualenv
```
- Unix/MacOS:
```
python3 -m pip install --user virtualenv
```
Graphviz: pm4py uses Graphviz to encode the structure of process models. It is the only software that needs to be installed on your system from https://graphviz.org/download/.

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