def test__heavy_atom_count():
""" test graph.explicit_hydrogen_count
"""
cgr = graph.explicit(C8H13O_CGR)
assert graph.heavy_atom_count(cgr) == 9
def __sort_value(args):
_, gra = args
val = (-heavy_atom_count(gra), -atom_count(gra), -electron_count(gra))
return val