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"""!
@brief Examples of usage and demonstration of abilities of DSATUR algorithm in graph coloring.
@authors Andrei Novikov (pyclustering@yandex.ru)
@date 2014-2020
@copyright BSD-3-Clause
"""
from pyclustering.utils.graph import read_graph, draw_graph;
from pyclustering.samples.definitions import GRAPH_SIMPLE_SAMPLES;
from pyclustering.gcolor.dsatur import dsatur;
def template_graph_coloring(filename):
graph = read_graph(filename);
dsatur_instance = dsatur(graph.data);
dsatur_instance.process();
coloring = dsatur_instance.get_colors();
print("Number colors: ", max(coloring));
draw_graph(graph, coloring);
def run_all_graph_simple_samples():
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_BROKEN_CIRCLE1);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_BROKEN_CIRCLE2);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_FIVE_POINTED_FRAME_STAR);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_FIVE_POINTED_STAR);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_FULL1);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_FULL2);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_ONE_CIRCLE1);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_ONE_CIRCLE2);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_ONE_CIRCLE3);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_ONE_CROSSROAD);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_ONE_LINE);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_TWO_CROSSROADS);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_SIMPLE1);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_SIMPLE2);
template_graph_coloring(GRAPH_SIMPLE_SAMPLES.GRAPH_SIMPLE3);
run_all_graph_simple_samples();
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