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POWhy am I getting this openopt index error?
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  1. POWhy am I getting this openopt index error?
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    copied!<p>First, the error:</p> <pre><code>Traceback (most recent call last): File "tsp_solver.py", line 57, in &lt;module&gt; 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 &lt;module&gt; 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 </code></pre> <p>I have literally no idea why am I getting this error. I have a pretty basic OpenOpt TSP solver instance here, and it completely doesn't work. I'm using networkx for the graphs, and just adding edge by edge with weight = distance. The error happens when I pass the TSP instance to the solver, but I clearly don't know why. Here's my code, any help would be immensely appreciated. </p> <pre><code>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) &gt; 1: fileLocation = sys.argv[1].strip() inputDataFile = open(fileLocation, 'r') inputData = ''.join(inputDataFile.readlines()) inputDataFile.close() solveTSP(inputData) </code></pre>
 

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