def main():
# validate the params
if len(sys.argv) != 2:
print("Usage: python3 main.py <NETWORK_FILE>")
sys.exit(-1)
# read in the network from file
net = network.readFromFile(sys.argv[1])
# create the problem model
model = problem.Problem(net)
# search using BFS
bfsSearcher = bfs.BFS(model)
bfsSearcher.search()
# search using dijkstra
dijkstraSearcher = dijkstra.Dijkstra(model)
dijkstraSearcher.search()
# search using A*
astarSearcher = astar.AStar(model)
astarSearcher.search()
# search using beam search
beamSearcher = beams.Beams(model)
beamSearcher.search()
# search using Iterative Deepening
idSearcher = iterativedeepening.IterDeep(model)
idSearcher.search()
def test_dijkstra():
graph = {
'a': {
'b': 3,
'd': 7
},
'b': {
'a': 3,
'd': 2,
'c': 4
},
'c': {
'b': 4,
'd': 5,
'e': 6
},
'd': {
'a': 7,
'b': 2,
'c': 5,
'e': 4
},
'e': {
'c': 6,
'd': 4
}
}
parent, distance = dijkstra.Dijkstra(graph, 'a')
assert distance['a'] == 0
assert distance['b'] == 3
assert distance['c'] == 7
assert distance['d'] == 5
assert distance['e'] == 9
def search_CARP(file_name, limited_time, ram_seed):
"""
:param file_name: 文件名
:param limited_time: 限制时间
:param ram_seed: 随机种子
:return: None，标准打印
"""
start = time.time()
sample = read_data(file_name)
vehicles = sample[5]
capacity = sample[6]
random.seed(ram_seed)
# print sample
# print_head(sample)
free = free_edge_set(sample)
# print free
vertex = matrix_tran(sample)
vertex_dij = dij.Dijkstra(vertex)
# vertex_dij.print_graph()
group = Population(200, 600, vertex_dij)
group.initial(2000, free, vertex_dij, vehicles, capacity)
group.select()
# group.top_best(3)
run_time = (time.time() - start)
count = 1
end_time = limited_time - 1.5
while run_time <= end_time:
# print "\nLOOP: {}".format(count)
if group.check_mature():
rule_num = random.randint(4, 5)
# print "-----------resize-----------"
group.resize(5)
group.mature_reset()
else:
rule_num = random.randint(1, 5)
group.mature_reset()
# rule_num = random.randint(1, 5)
group.generate(rule_num, vehicles, capacity)
group.select()
# group.top_best(5)
run_time = (time.time() - start)
# print "LOOP: {} TIME: {}s RULE: {}".format(count, run_time, rule_num)
count += 1
run_time = (time.time() - start)
# print "\nTIME: {}s".format(run_time)
group.print_result()
def find_shortest_connection(self, stop1, stop2):
if not self.dijkstra:
self.dijkstra = dijkstra.Dijkstra(self)
min_travel_time, min_connections_path = self.dijkstra.min_path(stop1, stop2)
if not min_connections_path:
print("Brak połączenia pomiędzy przystankami....")
return (None, None)
else:
shortest_connection = [ str(conn.start_stop()) + "(" + str(conn.line_number()) + ")" for conn in min_connections_path]
shortest_connection.append(str(min_connections_path[-1].end_stop()))
return (min_travel_time, shortest_connection)
def find_min_path(self, v1, v2):
""" Metoda znajdująca najkrótszą scieżkę (o najniższym koszcie)
pomiędzy wierzchołkami v1 i v2 grafu. """
if not self.dijkstra:
self.dijkstra = dijkstra.Dijkstra(self)
min_path_cost, min_path_edges = self.dijkstra.min_path(v1, v2)
if not min_path_edges:
print("Brak połączenia pomiędzy wierzchołkami...")
return (None, None)
else:
min_path = [edge.source() for edge in min_path_edges]
min_path.append(min_path_edges[-1].target())
return (min_path_cost, min_path)
def setUp(self):
self.graph = Graph()
self.graph.add_vertex(Vertex("a"))
self.graph.add_vertex(Vertex("b"))
self.graph.add_vertex(Vertex("c"))
self.graph.add_vertex(Vertex("d"))
self.graph.add_vertex(Vertex("e"))
self.graph.add_vertex(Vertex("f"))
self.graph.add_undirected_edge(Vertex("a"), Vertex("b"), 2)
self.graph.add_undirected_edge(Vertex("a"), Vertex("e"), 3)
self.graph.add_undirected_edge(Vertex("b"), Vertex("e"), 2)
self.graph.add_undirected_edge(Vertex("b"), Vertex("c"), 1)
self.graph.add_undirected_edge(Vertex("c"), Vertex("d"), 2)
self.graph.add_undirected_edge(Vertex("d"), Vertex("e"), 3)
self.graph.add_undirected_edge(Vertex("d"), Vertex("f"), 4)
self.dijkstra = dijkstra.Dijkstra(self.graph)
def computeUtil(no_graphs, no_src_dest,no_verts,degree):
dij_times = []
dij_heap_times = []
kruskal_times = []
for i in range(no_graphs):
print "="*25 + " Graph "+str(i+1)+" "+"="*25
print "============= Vertices = "+str(no_verts)+ " Degree = "+str(degree)+" =============="
print "="*59+"\n"
graph, vertex = generate_graph.generate(no_verts,degree)
for j in range(no_src_dest):
src = random.randint(1,no_verts-1)
dest = random.randint(1,no_verts-1)
print "="*40
while(dest == src or dest == src + 1 or dest == src-1):
dest = random.randint(1,no_verts-1)
dij = dijkstra.Dijkstra(graph,vertex,src,dest)
report1 = dij.dijkstra()
dij_times.append(float(report1[1].split(' ')[0]))
del dij
print report1[:-1],"\n"
dij_heap = dijkstra_heap.DijkstraHeap(graph,vertex,src,dest)
report2 = dij_heap.dijkstra()
dij_heap_times.append(float(report2[1].split(' ')[0]))
del dij_heap
print report2[:-1],"\n"
krus = kruskals.Kruskals(graph,vertex,src,dest)
report3 = krus.findPath()
kruskal_times.append(float(report3[1].split(' ')[0]))
del krus
print report3[:-1],"\n"
print "====== Average Times ======"
print "Dijkstra without heap: ",sum(dij_times)/len(dij_times), " seconds"
print "Dijkstra with heap : ",sum(dij_heap_times)/len(dij_heap_times), " seconds"
print "Kruskals : ",sum(kruskal_times)/len(kruskal_times), " seconds"
def phase1():
img = Image.open('maze.png')
data = list(img.getdata())
start = 639, 0
end = 1, 640
g = G(data, img.size)
print('Dijkstra...')
D, P = dijkstra.Dijkstra(g, start, end)
# Construct path from P; add color values in the same pass
print('Constructing path...')
path = []
pos = end
while True:
x, y = pos
path.append((pos, data[x + img.size[0] * y][0]))
if pos == start:
break
pos = P[pos]
path.reverse()
# Save the sequence to file, so we can study it without having to
# recalculate it again and again
pickle.dump(path, open('maze.sequence', 'wb'))
print('path pickled as maze.sequence')
def traverse_graph(self):
# Creating new graph traverser
if self.rbSelectedValue.get() == "DFS":
if self.dfs_query == "yes":
self.graph_traverser = dfs_iterative.DFSIterative(self.grp)
else:
self.graph_traverser = dfs_recursive.DFSRecursive(self.grp)
elif self.rbSelectedValue.get() == "BFS":
self.graph_traverser = bfs.BFS(self.grp)
elif self.rbSelectedValue.get() == "Dijkstra":
self.graph_traverser = dijkstra.Dijkstra(self.grp, None)
elif self.rbSelectedValue.get() == "Astar":
self.graph_traverser = astar.AStar(self.grp, self.rb_heuristic_value.get())
# Traversing the graph and getting traverse node path
self.traverse_time_start = time.time()
self.path, self.steps = self.graph_traverser.traverse()
if self.path == []:
tkMessageBox.showerror("Error", "Graph traversing failed")
self.traverse_time_end = time.time()
import numpy as np #import draw import dijkstra d = dijkstra.Dijkstra(50, (1, 1), (30, 20), 0, [(2, 2), (2, 3),(20,10),(15,7)]) d.search() print(d.routeHeight)
import dijkstra
graph = dict()
graph['start'] = {}
graph['start']['a'] = 6
graph['start']['b'] = 2
graph['a'] = {}
graph['a']['fin'] = 1
graph['b'] = {}
graph['b']['a'] = 3
graph['b']['fin'] = 5
graph['fin'] = {}
infinity = float('inf')
costs = dict()
costs['a'] = 6
costs['b'] = 2
costs['fin'] = infinity
parents = dict()
parents['a'] = 'start'
parents['b'] = 'start'
parents['fin'] = None
run = dijkstra.Dijkstra(graph, costs, parents)
print(run.get_path())
print(run.get_path_str())
print(run.get_length())
def query(self, city1="", city2="", scale=0):
rsp = {}
if city1 == city2:
rsp["error"] = "src_city must be different with tgt_city"
return rsp
#兼容处理
if city1.isdigit():
cityid1 = city1
cityid2 = city2
if cityid1 not in self.id_city_map2:
rsp["error"] = "cannot find cityid:{0}".format(cityid1)
return rsp
if cityid2 not in self.id_city_map2:
rsp["error"] = "cannot find cityid:{0}".format(cityid2)
return rsp
city1 = self.id_city_map2[cityid1]
city2 = self.id_city_map2[cityid2]
if city1 not in self.city_id_map:
logger.debug(
"queryrequest c1x:{0} c2:{1} >canot find city ".format(
city1, city2))
rsp["error"] = "cannot find city:{0}".format(city1)
return rsp
if city2 not in self.city_id_map:
logger.debug(
"queryrequest c1:{0} c2x:{1} >canot find city ".format(
city1, city2))
rsp["error"] = "cannot find city:{0}".format(city2)
return rsp
cityid1 = self.city_id_map[city1]
cityid2 = self.city_id_map[city2]
cityidrange = self.get_cityidrange(cityid1, cityid2)
citynamerange = [self.id_city_map[x] for x in cityidrange]
logger.debug(
"queryrequest,from {0} to {1}，cid:{2} > {3} range:{4}".format(
city1, city2, cityid1, cityid2, citynamerange))
neighbours = []
if scale > 0:
ylist = self.distance_mat[cityid2]
for i in range(len(ylist)):
if ylist[i] <= scale * 1000:
neighbours.append((self.id_city_map[i], ylist[i]))
neighbours = sorted(neighbours, key=lambda x: x[1])
neighbours2 = [item[0] for item in neighbours if item[0] != city2]
if len(cityidrange) <= 2:
logger.debug(
"len(cityidrange) <=2: cityidrange:{0}".format(cityidrange))
rsp["from2"] = city1
rsp["to2"] = city2
rsp["distance"] = self.distane(city1, city2)
rsp["pass2"] = []
rsp["pass"] = []
rsp["from"] = self.city_id_map2[city1]
rsp["to"] = self.city_id_map2[city2]
rsp["neighbours2"] = neighbours2
rsp["neighbours"] = [self.city_id_map2[k] for k in neighbours2]
return rsp
smallworld = self.create_smallworld(cityid1, cityid2, cityidrange)
# for k,v in smallworld.items():
# print(k,v)
# print(">>>dijkstra...",len(smallworld))
dis, paths = dijkstra.Dijkstra(smallworld, cityid1)
# print(">>>dijkstra222...")
result = {}
for k, plist in paths.items():
c = self.id_city_map[k]
result[c] = {}
result[c]["from2"] = city1
result[c]["to2"] = city2
result[c]["distance"] = dis[k]
result[c]["pass2"] = [self.id_city_map[k] for k in plist]
result[c]["pass"] = [
self.city_id_map2[self.id_city_map[k]] for k in plist
]
result[c]["from"] = self.city_id_map2[city1]
result[c]["to"] = self.city_id_map2[city2]
result[c]["neighbours2"] = neighbours2
result[c]["neighbours"] = [
self.city_id_map2[k] for k in neighbours2
]
if city2 not in result:
rsp["error"] = "city:{0},process error".format(city2)
# print(result)
return rsp
rsp = result[city2]
return rsp
def min_dpa(N, d, l, d0):
r = math.sqrt((d * l * l) / (math.pi * (N - 1)))
connected = False
while not connected:
# graph construction initial step: create first node randomly
x = random.random() * l
y = random.random() * l
p = [[x, y]]
S = ['node_1']
# for the next rounds (>= 2nd round)
for k in range(2, N):
degrees = calculate_approximate_degrees(S, p,
r) #of all nodes in Sk-1
L = min(degrees) # min of approximate degrees
weight = [0] * len(S)
# for each node m in Sk-1 that has degree L do:
for m, node in enumerate(S):
if degrees[m] == L:
if disk_belongs_square_area(p[m], r, l):
weight[m] = 1
else:
weight[m] = 2. / 3
# C(xc,yc) = randomize_center_select(weight)
i = weighted_choice(weight)
xc = p[i][0]
yc = p[i][1]
accepted = False
while not accepted:
v = random.random() * (r**2)
a = math.sqrt(v)
theta = random.random() * (2 * math.pi)
xz = xc + a * math.cos(theta)
yz = yc + a * math.sin(theta)
if not point_belongs_square_area([xz, yz], l):
print "New point not accepted: outside square region"
elif not proximity_test([xz, yz], p, d0):
print "New point not accepted: failed proximity test"
else:
p.append([xz, yz])
S.append('node_' + str(k))
accepted = True
# Calculate edge lenghts lij = norm(pi,pj)
edge_ij = []
for i in range(0, len(S)):
for j in range(i + 1, len(S)):
edge_ij.append(
math.sqrt(
math.pow((p[i][0] - p[j][0]), 2) +
math.pow((p[i][1] - p[j][1]), 2)))
# Sort lij i,j in {1,2,..., N}
edge_ij.sort()
# Select ((N*d)/2) shortest (to determine the actual transmition radius of the graph)
try:
graph_transmition_radius = edge_ij.pop((N * d) / 2)
# Form candidate graph Gc with ((N*d)/2) edges
graph = form_candidate_graph(S, p, graph_transmition_radius)
# Run Dijkstra for Gc
Distances, Predecessors = dijkstra.Dijkstra(graph, S[0])
# if all costs finite the connected will be True
for i in graph:
for j in graph[i]:
if graph[i][j] != numpy.inf:
connected = True
else:
connected = False
except IndexError:
print "Approximate degrees to high for the number of total nodes!"
S = []
p = []
graph = {}
return S, p, graph
return S, p, graph
def dijkstra_map(board, start, end, test=is_nonwall):
"Run Dijkstra's algorithm and return the distance map."
d, p = dijkstra.Dijkstra(DijkstraGraph(board, test), start, end)
return d
#!/usr/bin/python
##import setup_readfile as setup
import dijkstra
##import setup_png as png
if __name__ == '__main__':
d = dijkstra.Dijkstra()
d.set_gpu(True)
width = 8
height = 8
startx = 4
starty = 0
endx = 7
endy = 6
WALL = 100
maze = [0] * (width * height)
dist = [0] * (width * height)
prev = [0] * (width * height)
visited = [0] * (width * height)
onethird = int(height / 3)
twothirds = int(height * 2 / 3)
for i in range(0, 6): #(0,7)
maze[(onethird * width) + i] = WALL
for i in range(4, width):
def __init__(self, player_pos):
self.field, self.edge = self.GetInitialField()
self.dijk = dijkstra.Dijkstra(self.edge)
self.pos = [7, 7]
self.player_pos = player_pos[:]