まず、エラー:
Traceback (most recent call last):
File "tsp_solver.py", line 57, in <module>
solvetTSP(inputData)
NameError: name 'solvetTSP' is not defined
new-host:tsp Jonathan$ python tsp_solver.py data/tsp_51_1
Traceback (most recent call last):
File "tsp_solver.py", line 57, in <module>
solveTSP(inputData)
File "tsp_solver.py", line 36, in solveTSP
r = p.solve('sa')
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site- packages/openopt-0.506-py2.7.egg/openopt/kernel/TSP.py", line 150, in solve
EdgesCoords.append((node, Out_nodes[i]))
IndexError: index 1 is out of bounds for axis 0 with size 1
なぜこのエラーが発生するのか、文字通りわかりません。ここに非常に基本的な OpenOpt TSP ソルバー インスタンスがありますが、まったく機能しません。グラフに networkx を使用し、重み = 距離でエッジごとに追加するだけです。TSP インスタンスをソルバーに渡すとエラーが発生しますが、その理由は明らかにわかりません。これが私のコードです。どんな助けでも大歓迎です。
from openopt import *
import networkx as nx
import math
def length(point1, point2):
return math.sqrt((point1[0] - point2[0])**2 + (point1[1] - point2[1])**2)
def solveTSP(inputData):
inputData = inputData.split('\n')
inputData.pop(len(inputData) - 1)
N = int(inputData.pop(0))
points = []
for i in inputData:
point = i.split(" ")
point = [float(x) for x in point]
point = tuple(point)
points.append(point)
G = nx.Graph()
prev_point = None
for cur_point in points:
assert(len(cur_point) == 2)
if prev_point != None:
a = length(cur_point, prev_point)
G.add_edge(cur_point, prev_point, weight = a)
else:
G.add_node(cur_point)
prev_point = cur_point
p = TSP(G, objective = 'weight', start = 0)
r = p.solve('sa')
r.nodes.pop(len(r.nodes)-1)
distance = r.ff
path = r.nodes
print distance
print path
import sys
if __name__ == '__main__':
if len(sys.argv) > 1:
fileLocation = sys.argv[1].strip()
inputDataFile = open(fileLocation, 'r')
inputData = ''.join(inputDataFile.readlines())
inputDataFile.close()
solveTSP(inputData)