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Utils.py
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Utils.py
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import random
from City import City
from Graph import Graph
def readFile(filename):
'''
Given a file name
:return: information of clu-SPT Problem :
name : name of instance
dimension : number of vertex
number_of_cluster : number of cluster
clusterSection : set of vertex of each cluster
clusterInfo : number of vertex of each cluster
'''
# Open file
f = open(filename, 'r')
# Read name
info = f.readline().strip().split()
name = info[2]
# Read dimension
f.readline()
info = f.readline().strip().split()
dimension = int(info[2])
# Read number of clusters
info = f.readline().strip().split()
number_of_cluster = int(info[1])
f.readline()
f.readline()
# Read position and build distance metrix
position = []
for i in range(dimension):
info = f.readline().strip().split()
position.append(City(int(info[1]), int(info[2])))
distance = []
for i in range(dimension):
x = []
for j in range(dimension):
x.append(position[i].euclidDistance(position[j]))
distance.append(x)
f.readline()
# Read source vertex and cluster section
info = f.readline().strip().split()
sourceVertex = int(info[1])
clusterSection = []
for i in range(number_of_cluster):
info = f.readline().strip().split()
x =[]
index = 1
while(int(info[index]) != -1):
x.append(int(info[index]))
index += 1
clusterSection.append(x)
# Re-order cluster section
for i in range(number_of_cluster):
for j in range(number_of_cluster-2,i-1,-1):
if len(clusterSection[j]) < len(clusterSection[j+1]):
temp = clusterSection[j]
clusterSection[j] = clusterSection[j+1]
clusterSection[j+1] = temp
clusterInfo = []
for i in range(number_of_cluster):
clusterInfo.append(len(clusterSection[i]))
f.close()
return name, dimension, number_of_cluster, distance, clusterInfo, clusterSection, sourceVertex
def encode_Prufer_cluster(genes):
'''
given prufer code . Encode to the dictionary of graph
'''
# Initialize
collections = []
n = len(genes)
degree = []
for i in range(n + 2):
degree.append(1)
for i in range(n):
degree[genes[i]] += 1
# add edge
for i in range(n):
for j in range(n + 2):
if degree[j] == 1:
collections.append((genes[i], j))
degree[genes[i]] -= 1
degree[j] -= 1
break
# add final edge
u = 0
v = 0
for i in range(n + 2):
if degree[i] == 1:
if u == 0:
u = i
else:
v = i
break
collections.append((u, v))
degree[u] -= 1
degree[v] -= 1
return collections
def encode_Prufer_graph(genes, clusterInfo, clusterSection, connector ):
g = Graph([])
start = 0
length = len(clusterInfo)
for i in range(length):
if clusterInfo[i] > 2:
gene = genes[start:start + max(clusterInfo[i] - 2, 1)]
start += clusterInfo[i] - 2
collection = encode_Prufer_cluster(gene)
for u, v in collection:
g.add(clusterSection[i][u], clusterSection[i][v])
elif clusterInfo[i] is 2:
g.add(clusterSection[i][0], clusterSection[i][1])
gene = []
for i in range(start, start+length -2):
gene.append(genes[i])
collection = encode_Prufer_cluster(gene)
for u, v in collection:
g.add(clusterSection[u][connector[u]], clusterSection[v][connector[v]])
return g
def random_Prufer(clusterInfo):
gen = []
connector = []
start = 0
length = len(clusterInfo)
for i in range(length):
if clusterInfo[i] > 2:
for j in range(start, start + clusterInfo[i] - 2):
gen.append(random.randint(0, clusterInfo[i] - 1))
start += clusterInfo[i] - 2
else:
gen.append(clusterInfo[i]-3)
start += 1
for i in range(start,start +length-2):
gen.append(random.randint(0,length-1))
for i in range(len(clusterInfo)):
connector.append(random.randint(0,clusterInfo[i] -1))
return gen, connector
def decodeMFO(genes,lstDecodePos,clusterInfo):
decodegene = []
index = 0
number = 0
for i in lstDecodePos:
index += 1
if number < len(clusterInfo):
if clusterInfo[number] > 2:
decodegene.append(genes[i] % clusterInfo[number])
if index == clusterInfo[number] - 2:
index = 0
number += 1
else:
decodegene.append(clusterInfo[number] - 3)
index = 0
number += 1
else:
decodegene.append(genes[i] % len(clusterInfo))
return decodegene
def decodeConnectorMFO(clusterInfo, connector):
decodeconnector = []
for i in range(len(clusterInfo)):
decodeconnector.append(connector[i] % clusterInfo[i])
return decodeconnector
if __name__=='__main__':
print('test')