class Graph:
def __init__(self, graphfile="graph.txt"):
self.nodelist = []
self.namelookup = dict()
self.idlookup = dict()
self.adjmatrix = None
self.load_graph(graphfile)
self.print_stats()
def load_graph(self, filename):
with open(filename, 'r') as graphfile:
if graphfile == None:
sys.exit("Graph File Non-Existent, ensure file exists.")
nodecount = 0
for line in graphfile:
if line.strip()[0] == '#':
continue
else:
matchobj = re.match(r"(?P<nodeone>\w+) (?P<nodetwo>\w+) (?P<adjval>\d+)", line)
if matchobj != None:
if matchobj.group('nodeone') not in self.idlookup:
self.namelookup[nodecount] = matchobj.group('nodeone')
self.idlookup[matchobj.group('nodeone')] = nodecount
self.nodelist.append([nodecount, matchobj.group('nodeone')])
nodecount += 1
if matchobj.group('nodetwo') not in self.idlookup:
self.namelookup[nodecount] = matchobj.group('nodetwo')
self.idlookup[matchobj.group('nodetwo')] = nodecount
self.nodelist.append([nodecount, matchobj.group('nodetwo')])
nodecount += 1
self.adjmatrix = AdjMatrix(nodecount)
graphfile.seek(0)
for line in graphfile:
if line.strip()[0] == '#':
continue
else:
matchobj = re.match(r"(?P<nodeone>\w+) (?P<nodetwo>\w+) (?P<adjval>\d+)", line)
if matchobj != None:
self.adjmatrix.set_adjvalue(self.idlookup[matchobj.group('nodeone')], self.idlookup[matchobj.group('nodetwo')], float(matchobj.group('adjval')))
def print_stats(self):
print ""
print self.nodelist
print self.namelookup
print self.idlookup
self.adjmatrix.print_adjmatrix
print ""
class TSPGraph:
def __init__(self):
self.nodelist = []
self.idlookup = []
self.adjmatrix = None
self.read_graph()
self.generate_adjmatrix()
def read_graph(self):
for line in sys.stdin:
# May restore index variable. This area kind of hacky.
nodeid, xcoord, ycoord = list(map(float, line.split()))
self.nodelist.append([len(self.nodelist), float(xcoord), float(ycoord)])
self.idlookup.append(int(nodeid))
def generate_adjmatrix(self):
self.adjmatrix = AdjMatrix(len(self.nodelist))
# Try to fix the redundant assignments later.
for n in self.nodelist:
for m in self.nodelist[n[0]:len(self.nodelist)]:
if m == n:
self.adjmatrix.set_adjvalue(n[0], m[0], 0)
else:
deltax = n[1] - m[1]
deltay = n[2] - m[2]
distance = math.sqrt(math.pow(deltax, 2) + math.pow(deltay, 2))
self.adjmatrix.set_adjvalue(n[0], m[0], distance)
