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Use nx functions to apply node and edge colourings. #36

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Use nx functions to apply node and edge colourings. #36

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9 changes: 3 additions & 6 deletions src/vizing/__init__.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
import constraint as ct
import networkx as nx

def node_list_colouring_problem(G):
"""
Expand All @@ -22,9 +23,7 @@ def node_list_colouring_solution(G):
:return A properly list-coloured graph.
"""
P = node_list_colouring_problem(G)
S = P.getSolution()
for node in S:
G.nodes[node]['colour'] = S[node]
nx.set_node_attributes(G, P.getSolution(), name = 'colour')
return(G)

def edge_list_colouring_problem(G, directed = False):
Expand Down Expand Up @@ -56,9 +55,7 @@ def edge_list_colouring_solution(G, directed = False):
:return A properly edge list-coloured graph.
"""
P = edge_list_colouring_problem(G, directed)
S = P.getSolution()
for edge in G.edges():
G.edges()[edge]['colour'] = S[edge]
nx.set_edge_attributes(G, P.getSolution(), 'colour')
return(G)

def total_list_colouring_problem(G):
Expand Down