====== Use Graphviz to Generate Graphs ======

Install it from https://graphviz.org/download/ and add the installation path to se PATH variable. \\ 
Then, install the library in python:
<code>
pip install graphviz
</code>

Then, you can generate graphs, example for an deterministic automaton:

<code python>
from graphviz import Digraph

# Init Digraph object.
dfa = Digraph(comment='AFD')

# Init transitions.
dfa.node('q0', 'q0')
dfa.node('q1', 'q1')
dfa.node('q2', 'q2', shape='doublecircle')

# Transitions
dfa.edge('q0', 'q0', label='a')
dfa.edge('q0', 'q1', label='b')
dfa.edge('q1', 'q2', label='a')
dfa.edge('q1', 'q1', label='b')
dfa.edge('q2', 'q0', label='a')
dfa.edge('q2', 'q1', label='b')

# Hot it should look.
dfa.attr(rankdir='LR')  # horizontal

# Save and print
dfa.render('afd_diagram', format='png', view=True)
</code>

Result:
{{:python:pasted:20250126-144618.png}}