def __init__(self):
"""
Create the queues
"""
self.sell = pqdict()
self.buy = pqdict()
def test_edgecases(self):
keys = ['A', 'B', 'C', 'D', 'E', 'F', 'G']
values = [1, 1, 1, 1, 1, 1, 1]
pq = pqdict(zip(keys, values))
pq['B'] = 2
self._check_heap_invariant(pq)
pq = pqdict(zip(keys, values))
pq['B'] = 0
self._check_heap_invariant(pq)
def test_edgecases(self):
keys = ['A', 'B', 'C', 'D', 'E', 'F', 'G']
values = [1, 1, 1, 1, 1, 1, 1]
pq = pqdict(zip(keys, values))
pq['B'] = 2
self._check_heap_invariant(pq)
pq = pqdict(zip(keys, values))
pq['B'] = 0
self._check_heap_invariant(pq)
def test_topitem(self):
# empty
pq = pqdict()
self.assertRaises(KeyError, pq.top)
# non-empty
for num_items in range(1,30):
items = generate_data('float', num_items)
pq = pqdict(items)
self.assertEqual(pq.topitem(), min(items, key=lambda x: x[1]))
def test_topitem(self):
# empty
pq = pqdict()
self.assertRaises(KeyError, pq.top)
# non-empty
for num_items in range(1, 30):
items = generate_data('float', num_items)
pq = pqdict(items)
self.assertEqual(pq.topitem(), min(items, key=lambda x: x[1]))
def test_edgecases():
keys = ["A", "B", "C", "D", "E", "F", "G"]
values = [1, 1, 1, 1, 1, 1, 1]
pq = pqdict(zip(keys, values))
pq["B"] = 2
_check_heap_invariant(pq)
pq = pqdict(zip(keys, values))
pq["B"] = 0
_check_heap_invariant(pq)
def test_topitem():
# empty
pq = pqdict()
with pytest.raises(KeyError):
pq.top()
# non-empty
for num_items in range(1, 30):
items = generate_data("float", num_items)
pq = pqdict(items)
assert pq.topitem() == min(items, key=lambda x: x[1])
def test_constructor(self):
# sequence of pairs
pq0 = pqdict(
[('A',5), ('B',8), ('C',7), ('D',3), ('E',9), ('F',12), ('G',1)])
pq1 = pqdict(
zip(['A', 'B', 'C', 'D', 'E', 'F', 'G'], [5, 8, 7, 3, 9, 12, 1]))
# dictionary
pq2 = pqdict({'A': 5, 'B': 8, 'C': 7, 'D': 3, 'E': 9, 'F': 12, 'G': 1})
# keyword arguments
pq3 = minpq(A=5, B=8, C=7, D=3, E=9, F=12, G=1)
self.assertTrue(pq0 == pq1 == pq2 == pq3)
def test_update(self):
pq1 = pqdict(sample_items)
pq2 = pqdict()
pq2['C'] = 3000
pq2['D'] = 4000
pq2['XYZ'] = 9000
pq1.update(pq2)
self.assertEqual(pq1['C'], 3000)
self.assertEqual(pq1['D'], 4000)
self.assertIn('XYZ', pq1)
self.assertEqual(pq1['XYZ'], 9000)
def test_constructor(self):
# sequence of pairs
pq0 = pqdict([('A', 5), ('B', 8), ('C', 7), ('D', 3), ('E', 9),
('F', 12), ('G', 1)])
pq1 = pqdict(
zip(['A', 'B', 'C', 'D', 'E', 'F', 'G'], [5, 8, 7, 3, 9, 12, 1]))
# dictionary
pq2 = pqdict({'A': 5, 'B': 8, 'C': 7, 'D': 3, 'E': 9, 'F': 12, 'G': 1})
# keyword arguments
pq3 = minpq(A=5, B=8, C=7, D=3, E=9, F=12, G=1)
self.assertTrue(pq0 == pq1 == pq2 == pq3)
def test_update():
pq1 = pqdict(sample_items)
pq2 = pqdict()
pq2["C"] = 3000
pq2["D"] = 4000
pq2["XYZ"] = 9000
pq1.update(pq2)
assert pq1["C"] == 3000
assert pq1["D"] == 4000
assert "XYZ" in pq1
assert pq1["XYZ"] == 9000
def test_update(self):
pq1 = pqdict(sample_items)
pq2 = pqdict()
pq2['C'] = 3000
pq2['D'] = 4000
pq2['XYZ'] = 9000
pq1.update(pq2)
self.assertEqual(pq1['C'],3000)
self.assertEqual(pq1['D'],4000)
self.assertIn('XYZ',pq1)
self.assertEqual(pq1['XYZ'],9000)
def test_constructor():
# sequence of pairs
pq0 = pqdict([("A", 5), ("B", 8), ("C", 7), ("D", 3), ("E", 9), ("F", 12),
("G", 1)])
pq1 = pqdict(
zip(["A", "B", "C", "D", "E", "F", "G"], [5, 8, 7, 3, 9, 12, 1]))
# dictionary
pq2 = pqdict({"A": 5, "B": 8, "C": 7, "D": 3, "E": 9, "F": 12, "G": 1})
# keyword arguments
pq3 = minpq(A=5, B=8, C=7, D=3, E=9, F=12, G=1)
assert pq0 == pq1 == pq2 == pq3
def test_precedes(self):
pq = pqdict()
self.assertEqual(pq.precedes, operator.lt)
pq = pqdict(reverse=True)
self.assertEqual(pq.precedes, operator.gt)
func = lambda x, y: len(x) < len(y)
pq = pqdict(precedes=func)
pq['a'] = ()
pq['b'] = (1, )
pq['c'] = (1, 2)
pq['d'] = (1, 2, 3)
self.assertEqual(list(pq.popvalues()), [(), (1, ), (1, 2), (1, 2, 3)])
def test_precedes(self):
pq = pqdict()
self.assertEqual(pq.precedes, operator.lt)
pq = pqdict(reverse=True)
self.assertEqual(pq.precedes, operator.gt)
func = lambda x, y: len(x) < len(y)
pq = pqdict(precedes=func)
pq['a'] = ()
pq['b'] = (1,)
pq['c'] = (1,2)
pq['d'] = (1,2,3)
self.assertEqual(list(pq.popvalues()), [(), (1,), (1,2), (1,2,3)])
def test_precedes():
pq = pqdict()
assert pq.precedes == operator.lt
pq = pqdict(reverse=True)
assert pq.precedes == operator.gt
func = lambda x, y: len(x) < len(y)
pq = pqdict(precedes=func)
pq["a"] = ()
pq["b"] = (1, )
pq["c"] = (1, 2)
pq["d"] = (1, 2, 3)
assert list(pq.popvalues()) == [(), (1, ), (1, 2), (1, 2, 3)]
def test_heapify(self):
for size in range(30):
items = generate_data('int', size)
pq = pqdict(items)
self._check_heap_invariant(pq)
self.assertTrue(len(pq._heap) == size)
self._check_index(pq)
def test_destructive_iteration(self):
for trial in range(100):
size = random.randrange(1,50)
items = generate_data('float', size)
keys, values = zip(*items)
if trial & 1: # Half of the time, heapify using the constructor
pq = pqdict(items)
else: # The rest of the time, insert items sequentially
pq = pqdict()
for key, value in items:
pq[key] = value
# NOTE: heapsort is NOT a stable sorting method, so keys with equal
# priority keys are not guaranteed to have the same order as in the
# original sequence.
values_heapsorted = list(pq.popvalues())
self.assertEqual(values_heapsorted, sorted(values))
def run_ucs(source, target, roads):
junctions = roads.junctions()
source_node_info = junctions[source]
closed = dict()
open = pqdict(precedes=min)
#add first node with parent of null and distance 0
open.additem(source, Node(source_node_info, None, 0))
while open is not None:
current = pop_node(open)
add_to_close(closed, get_node_index(current), current)
#if final node reached
if get_node_index(current) == target:
return build_path(current)
#ireate over all links
links = current.junction.links
for link in links:
succ = get_target(junctions, link)
cost = get_cost(link.distance, road_speed(
link.highway_type)) + current.distance
if get_succ_index(succ) in open.keys():
if open[get_succ_index(succ)].distance > cost:
update_node_distance(open, junctions, link, current, cost,
succ)
continue
if get_succ_index(succ) in closed:
if closed[get_succ_index(succ)].distance > cost:
update_distance_in_closed(open, closed, junctions, link,
current, cost, succ)
continue
add_to_open(open, Node(get_target(junctions, link), current, cost))
return None
def test_datetime():
pq = pqdict()
dt = datetime.now()
pq["a"] = dt
pq["b"] = dt + timedelta(days=5)
pq["c"] = dt + timedelta(seconds=5)
assert list(pq.popkeys()) == ["a", "c", "b"]
def pathfind(self) -> typing.Optional[typing.List[ReservationNode]]:
opened = pqdict({self.agent.pos: 0})
closed: typing.Set[ReservationNode] = set()
g_costs = {self.agent.pos: 0.0}
predecessors: typing.Dict[ReservationNode, ReservationNode] = {}
previously_reserved = self._previous_reserved()
agent_t = self.agent.pos.t
while opened:
curr = opened.pop()
closed.add(curr)
if curr.t == self.agent.pos.t + self.agent.lookahead:
path = [curr]
while path[-1] in predecessors:
path.append(predecessors[path[-1]])
path.reverse()
return path
# As we go into the future, backpressure decreases, so that
# it gradually becomes cheaper for agents to stay put
backpressure = max(1, previously_reserved - (curr.t - agent_t))
for (n, cost) in self.neighbors(curr, backpressure):
if n in closed:
continue
considered_g_cost = g_costs[curr] + cost
if considered_g_cost >= g_costs.get(n, float("nan")):
continue
g_costs[n] = considered_g_cost
predecessors[n] = curr
# Hm.
f_cost = (considered_g_cost +
(self.agent.pos.t + self.agent.lookahead - n.t))
if n not in opened:
opened.additem(n, f_cost)
else:
opened[n] = f_cost
return None
def weighted_a_star(g,start_tuple,goal_tuple,x_coord,y_coord,z_coord,eps,blocks):
'''
finds the path whcih is e-suboptimal
algorithms is given the project report
'''
openlist=pqdict()
closedlist=[]
fs=eps*np.linalg.norm((x_coord[start_tuple[0]]-x_coord[goal_tuple[0]],\
y_coord[start_tuple[1]]-y_coord[goal_tuple[1]],\
z_coord[start_tuple[2]]-z_coord[goal_tuple[2]]))
openlist.update({start_tuple:fs})
node_index=(x_coord.shape[0]+1,y_coord.shape[0]+1,z_coord.shape[0]+1)
Parent={}
#Weighted A-star algorithm, pseudocode given in the report
while(goal_tuple not in closedlist):
current_tuple=openlist.pop()
children=get_children(current_tuple,x_coord,y_coord,z_coord,g,blocks)
closedlist.append(current_tuple)
for (child,cij) in children:
if(child not in closedlist):
temp_val=cij+g[current_tuple[0],current_tuple[1],current_tuple[2]]
if(g[child[0],child[1],child[2]]>temp_val):
g[child[0],child[1],child[2]]=temp_val
Parent.update({child:current_tuple})
f=g[child[0],child[1],child[2]]+eps*np.linalg.norm((x_coord[child[0]]-x_coord[goal_tuple[0]],\
y_coord[child[1]]-y_coord[goal_tuple[1]],\
z_coord[child[2]]-z_coord[goal_tuple[2]]))
if(child in list(openlist.keys())):
openlist[child]=f
else:
openlist.update({child:f})
return Parent,closedlist,g
def __init__(self, DG: nx.DiGraph, s: int):
"""
dijkstra 算法
"""
self.__DG = DG
self.__s = s
n = DG.number_of_nodes()
self.__prev = [None] * n
self.dist2 = [float('inf')] * n
self.dist2[s] = 0
# 将距离向量建堆
pq = pqdict(dict(enumerate(self.dist2)))
# 循环弹出距离最近的顶点和距离
for v in pq.popkeys():
# 将最短路径经过的边的颜色改为红色
if v != s:
u = self.__prev[v]
self.__DG[u][v]['color'] = 'red'
# 缩短 v 所有的邻居 w 的距离
for w in self.__DG[v]:
new_dist = self.dist2[v] + self.__DG[v][w]['weight']
if new_dist < self.dist2[w]:
# 更新w的入边和距离
pq[w] = new_dist
self.dist2[w], self.__prev[w] = new_dist, v
# 断言条件
assert self.__check()
def test_datetime(self):
pq = pqdict()
dt = datetime.now()
pq['a'] = dt
pq['b'] = dt + timedelta(days=5)
pq['c'] = dt + timedelta(seconds=5)
self.assertEqual(list(pq.popkeys()), ['a', 'c', 'b'])
def __init__(self,
height=8,
width=8,
no_of_mines_in_board=0,
use_most_constrained=True,
use_probability=True):
# loading pattern db cache
self._constrained_variables = pqdict(reverse=True)
# Set initial height and width
self.height = height
self.width = width
# Keep track of which cells have been clicked on
self.opened_cells = set()
self.open_information = dict()
# Keep track of cells known to be safe or mines
self.mines = set()
self.prev_state = []
self.first_move = True
self.no_of_mines = no_of_mines_in_board
self.safes = set()
self.surely_safe = set()
self.linked_tiles = list()
self.last_random = None
self.disjoint_dict = dict()
self._use_most_constrained = use_most_constrained
self._open_count = dict()
self.closed_cells = set()
self.use_probability = use_probability
for i in range(self.height):
for j in range(self.width):
if (i, j) not in self.mines and (i,
j) not in self.opened_cells:
self.closed_cells.add((i, j))
def partition(comp_arrow: CompositeArrow) -> List[Set[Arrow]]:
"""Partitions the comp_arrow into sequential layers of its sub_arrows"""
partition_arrows = []
arrow_colors = pqdict()
for sub_arrow in comp_arrow.get_sub_arrows():
arrow_colors[sub_arrow] = sub_arrow.num_in_ports()
for port in comp_arrow.in_ports():
in_ports = comp_arrow.neigh_in_ports(port)
for in_port in in_ports:
assert in_port.arrow in arrow_colors, "sub_arrow not in arrow_colors"
arrow_colors[in_port.arrow] -= 1
while len(arrow_colors) > 0:
arrow_layer = set()
view_arrow, view_priority = arrow_colors.topitem()
while view_priority == 0:
sub_arrow, priority = arrow_colors.popitem()
arrow_layer.add(sub_arrow)
if len(arrow_colors) == 0:
break
view_arrow, view_priority = arrow_colors.topitem()
partition_arrows.append(arrow_layer)
for arrow in arrow_layer:
for out_port in arrow.out_ports():
in_ports = comp_arrow.neigh_in_ports(out_port)
for in_port in in_ports:
if in_port.arrow != comp_arrow:
assert in_port.arrow in arrow_colors, "sub_arrow not in arrow_colors"
arrow_colors[in_port.arrow] -= 1
return partition_arrows
def test_datetime(self):
pq = pqdict()
dt = datetime.now()
pq['a'] = dt
pq['b'] = dt + timedelta(days=5)
pq['c'] = dt + timedelta(seconds=5)
self.assertEqual(list(pq.popkeys()), ['a', 'c', 'b'])
def UCS(self, start_node, end_node):
visited = set(
) # set of nodes that have already been popped from the queue
pq = pqdict({start_node: 0}) # priority queue
parent = {
start_node: None
} # dictionary storing the parent (ID) of each traversed node
while True:
try:
cur_cost = pq[pq.top()] # cost of reaching this node
cur = int(pq.pop()) # ID of the current node
for n in self._nodes[cur]: # neighbors of current node
if n not in visited:
# calculate the cost to reach node n
n_cost = cur_cost + self._getWeight(cur, n)
if n in pq:
if n_cost < pq[n]:
# cheaper route to node discovered
pq[n] = n_cost # update priority
parent[n] = cur # update parent
else:
pq[n] = n_cost # add to priority queue
parent[n] = cur # remember how we reached n
visited.add(cur) # remember that this node was visited
if cur == end_node:
break
except KeyError:
# priority queue is empty
break
self._printResults(parent, end_node)
def crawl(url, xpaths):
list_of_url_tuples = []
priority_queue_urls = pqdict({url: 1},
reverse=True) # max-heap priority-queue
crawled_urls = set()
return crawl_with_priority(crawled_urls, priority_queue_urls, xpaths,
list_of_url_tuples)
def test_heapify():
for size in range(30):
items = generate_data("int", size)
pq = pqdict(items)
_check_heap_invariant(pq)
assert len(pq._heap) == size
_check_index(pq)
def __init__(self, seed):
# the larger the more important (reverse=True)
self.crawl_frontier = pqdict.pqdict({user_id: 0
for user_id in seed},
reverse=True)
self.visited = []
self.graph = nx.DiGraph()
def test_heapify(self):
for size in range(30):
items = generate_data('int', size)
pq = pqdict(items)
self._check_heap_invariant(pq)
self.assertTrue(len(pq._heap) == size)
self._check_index(pq)
def initialize_frontier(self, start):
starting_edges = {}
for edge in self.graph[start]:
node = edge[0]
cost = edge[1]
starting_edges[node] = cost
return pqdict(starting_edges)
def test_uncomparable():
# non-comparable priority keys (Python 3 only)
# Python 3 has stricter comparison than Python 2
pq = pqdict()
pq.additem("a", [])
with pytest.raises(TypeError):
pq.additem("b", 5)
def test_destructive_iteration():
for trial in range(100):
size = random.randrange(1, 50)
items = generate_data("float", size)
keys, values = zip(*items)
if trial & 1: # Half of the time, heapify using the constructor
pq = pqdict(items)
else: # The rest of the time, insert items sequentially
pq = pqdict()
for key, value in items:
pq[key] = value
# NOTE: heapsort is NOT a stable sorting method, so keys with equal
# priority keys are not guaranteed to have the same order as in the
# original sequence.
values_heapsorted = list(pq.popvalues())
assert values_heapsorted == sorted(values)
def test_iter(self):
# non-destructive
n = len(sample_items)
pq = pqdict(sample_items)
for val in iter(pq):
self.assertIn(val, sample_keys)
self.assertEqual(len(list(iter(pq))), len(sample_keys))
self.assertEqual(len(pq), n)
def test_copy():
pq1 = pqdict(sample_items)
pq2 = pq1.copy()
assert pq1 == pq2
key = random.choice(sample_keys)
pq2[key] += 1
assert pq1[key] != pq2[key]
assert pq1 != pq2
def test_copy(self):
pq1 = pqdict(sample_items)
pq2 = pq1.copy()
self.assertEqual(pq1, pq2)
key = random.choice(sample_keys)
pq2[key] += 1
self.assertNotEqual(pq1[key], pq2[key])
self.assertNotEqual(pq1, pq2)
def test_updates(self):
items = generate_data('int')
keys, values = zip(*items)
pq = pqdict(items)
for _ in range(100):
pq[random.choice(keys)] = random.randrange(25)
self._check_heap_invariant(pq)
self._check_index(pq)
def test_iter(self):
# non-destructive
n = len(sample_items)
pq = pqdict(sample_items)
for val in iter(pq):
self.assertIn(val, sample_keys)
self.assertEqual(len(list(iter(pq))), len(sample_keys))
self.assertEqual(len(pq), n)
def test_updates():
items = generate_data("int")
keys, values = zip(*items)
pq = pqdict(items)
for _ in range(100):
pq[random.choice(keys)] = random.randrange(25)
_check_heap_invariant(pq)
_check_index(pq)
def test_iter():
# non-destructive
n = len(sample_items)
pq = pqdict(sample_items)
for val in iter(pq):
assert val in sample_keys
assert len(list(iter(pq))) == len(sample_keys)
assert len(pq) == n
def test_delitem(self):
n = len(sample_items)
pq = pqdict(sample_items)
key = random.choice(sample_keys)
del pq[key]
self.assertEqual(len(pq), n-1)
self.assertNotIn(key, pq)
self.assertRaises(KeyError, pq.pop, key)
def load(self):
'''
Loads the pqdict and experience dict
'''
tmp = pkl.load(open("myPER", "rb"))
tmp1, tmp2 = tmp
self.buffer2 = tmp2
self.pq = pqdict(tmp1, reverse=True)
return True
def test_equality(self):
# eq
pq1 = pqdict(sample_items)
pq2 = pqdict(sample_items)
self.assertTrue(pq1 == pq2)
self.assertFalse(pq1 != pq2)
# ne
pq2[random.choice(sample_keys)] += 1
self.assertFalse(pq1 == pq2)
self.assertTrue(pq1 != pq2)
# pqdict == regular dict if they have same key/value pairs
adict = dict(sample_items)
self.assertEqual(pq1, adict)
# TODO: FIX?
# pqdicts evaluate as equal even if they have different
# key functions and/or precedence functions
pq3 = maxpq(sample_items)
self.assertEqual(pq1, pq3)
def test_infvalue(self):
keys = ['A', 'B', 'C', 'D', 'E', 'F', 'G']
values = [1, 2, 3, 4, 5, 6, 7]
pq = pqdict(zip(keys, values))
pq.additem('top', -float('inf'))
pq.additem('bot', float('inf'))
keys_sorted = [key for key in pq.popkeys()]
self.assertEqual(keys_sorted[0], 'top')
self.assertEqual(keys_sorted[-1], 'bot')
def test_setitem(self):
n = len(sample_items)
pq = pqdict(sample_items)
pq['new'] = 1.0 # add
self.assertEqual(pq['new'], 1.0)
self.assertEqual(len(pq), n+1)
pq['new'] = 10.0 # update
self.assertEqual(pq['new'], 10.0)
self.assertEqual(len(pq), n+1)
def test_updateitem(self):
pq = pqdict(sample_items)
key, value = random.choice(sample_items)
# assign same value
pq.updateitem(key, value)
self.assertEqual(pq[key], value)
# assign new value
pq.updateitem(key, value + 1.0)
self.assertEqual(pq[key], value + 1.0)
# can only update existing keys
self.assertRaises(KeyError, pq.updateitem, 'does_not_exist', 99.0)
def test_updates_and_deletes(self):
items = generate_data('int')
keys, values = zip(*items)
pq = pqdict(items)
for oper in range(100):
if oper & 1: # update random item
key = random.choice(keys)
p_new = random.randrange(25)
pq[key] = p_new
self.assertTrue(pq[key] == p_new)
elif pq: # delete random item
key = random.choice(list(pq.keys()))
del pq[key]
self.assertTrue(key not in pq)
self._check_heap_invariant(pq)
self._check_index(pq)
def test_heapsort(self):
# sequences of operations
pq = pqdict()
self._check_heap_invariant(pq)
self._check_index(pq)
# push in a sequence of items
items = generate_data('int')
added_items = []
for key, value in items:
pq.additem(key, value)
self._check_heap_invariant(pq)
self._check_index(pq)
added_items.append((key, value))
# pop out all the items
popped_items = []
while pq:
key_value = pq.popitem()
self._check_heap_invariant(pq)
self._check_index(pq)
popped_items.append(key_value)
self.assertTrue(len(pq._heap) == 0)
self._check_index(pq)
def run_astar(
source_junction_index, target_junction_index, t0, price_func=price_function, heuristic_func=heuristic_function
):
global roads
roads = load_map_from_csv()
global roads_junctions
roads_junctions = roads.junctions()
source_junction = roads_junctions[source_junction_index]
target_junction = roads_junctions[target_junction_index]
closed_list = dict()
open_pqdict = pqdict(precedes=comparator_f)
source_h_value = heuristic_func(source_junction, target_junction)
open_pqdict.additem(source_junction_index, Node(source_junction, None, 0, source_h_value, source_h_value))
while open_pqdict: # while pqdict is not empty
best_node = open_pqdict.popitem()[1]
closed_list[best_node.junction.index] = best_node
if best_node.junction.index == target_junction_index:
return format_result(best_node)
for lnk_to_son in best_node.junction.links:
son = roads_junctions[lnk_to_son.target]
son_g_value = price_func(lnk_to_son, t0) + best_node.g_value
son_h_value = heuristic_func(son, target_junction)
if son.index in open_pqdict.keys():
if open_pqdict[son.index].g_value > son_g_value:
son_copy = Node(son, best_node, son_g_value, son_h_value, son_h_value + son_g_value)
open_pqdict.updateitem(son.index, son_copy)
continue
if son.index in closed_list:
if closed_list[son.index].g_value > son_g_value:
son_copy = Node(son, best_node, son_g_value, son_h_value, son_h_value + son_g_value)
del closed_list[son.index]
open_pqdict.additem(son_copy.junction.index, son_copy)
continue
open_pqdict.additem(son.index, Node(son, best_node, son_g_value, son_h_value, son_g_value + son_h_value))
return None
def __init__(self, **args):
'''
Prioritized experience replay
Currently, the rank-based variant is implemented but not the proportional variant
'''
self.size = args['size'] # size of the replay memory
self.alpha = args['alpha'] # determine how much prioritization is used, alpha = 0 = uniform case
beta_zero = args['beta_zero'] # beta is annealed from beta_zero to 1
self.beta = beta_zero
self.batch_size = args['batch_size']
self.k = args['nb_segments'] # k, number of segments
self.annealing_beta_steps = args['annealing_beta_steps'] # number of step to anneale beta from beta_zero to 1
self.decrease_step_beta = (1 - beta_zero) / self.annealing_beta_steps
#priority queue, reverse = True = max heap
#transition must be saved as (priority, (s, a, r, s1, terminal))
self.pq = pqdict({}, reverse=True)
self.buffer2 = np.array([(1,1) for i in range(self.size)]) # for test_PER2
#dtypes = dict(names=['s', 'a', 'r', 's1', 't'], formats=[np.ndarray,'i8', 'i8', np.ndarray, 'bool'])
#self.buffer2 = np.array([(np.ones(1), 1, 1, np.ones(1), 1) for i in range(self.size)], dtype=dtypes)
self.tsp = self.build_tsp()
def test_items(self):
pq = pqdict(sample_items)
self.assertEqual(sorted(sample_items), sorted(pq.items()))
self.assertEqual(
sorted(sample_values), [item[1] for item in pq.popitems()])
def a_star(graph: Graph, start: Node, goal: Node, heuristic):
"""
Standard A* search algorithm.
:param graph: Graph A graph with all nodes and connections
:param start: Node Start node, where the search starts
:param goal: Node End node, the goal for the search
:return: shortest_path: list|False Either a list of node ids or false
"""
# Indexed priority queue
queue = pqdict()
# All visited connections
visited_stack = {}
# Add start node
visited_stack[start] = True
# The costs from start to a node
cost_to_node = {}
# Full costs from a node to goal
full_costs = {}
# All paths that have been taken
shortest_path = []
# Create a dummy for the start node
dummy_connection = Connection(start, start)
# Assign it to the queue so we can start
queue[dummy_connection] = 0
while queue:
# Get next connection from top queue
# and remove it (its a get + pop)
connection = queue.pop()
# Add the node to the shortest path
# cause otherwise we would not be here
shortest_path.append(connection)
cost_to_node[connection.to_node] = connection.cost
# We have found the target
if connection.to_node.id == goal.id:
# Remove all unneded paths and return
# a sorted list
return clean_route_list(shortest_path, goal.id)
# Get all connected nodes
next_connections = graph.get_connections(connection.to_node)
# Iterate through all connected nodes
# and calculate the costs and stuff
for c in next_connections:
# Calculate total costs from start to the goal node
to_goal_cost = heuristic(goal.position, c.to_node.position)
# Calculate costs from start to this node
current_cost = cost_to_node[connection.to_node] + c.cost
# Update lists and costs
queue[c] = current_cost
cost_to_node[c.to_node] = current_cost
full_costs[c.to_node] = current_cost + to_goal_cost
visited_stack[c.to_node] = True
# Never found the target, so sad ...
return False
def test_setdefault(self):
pq = pqdict(sample_items)
self.assertEqual(pq.setdefault('A',99), 5)
self.assertEqual(pq.setdefault('new',99), 99)
self.assertEqual(pq['new'], 99)
def test_uncomparable(self):
# non-comparable priority keys (Python 3 only)
# Python 3 has stricter comparison than Python 2
pq = pqdict()
pq.additem('a',[])
self.assertRaises(TypeError, pq.additem, 'b', 5)
def test_keyfn(self):
pq = pqdict()
self.assertEqual(pq.keyfn(5), 5)
pq = pqdict(key=lambda x: len(x))
self.assertEqual(pq.keyfn([1,2,3]), 3)
def test_additem(self):
pq = pqdict(sample_items)
pq.additem('new', 8.0)
self.assertEqual(pq['new'], 8.0)
self.assertRaises(KeyError, pq.additem, 'new', 1.5)
def test_values(self):
pq = pqdict(sample_items)
self.assertEqual(sorted(sample_values), sorted(pq.values()))
self.assertEqual(sorted(sample_values), list(pq.popvalues()))
def test_keys(self):
pq = pqdict(sample_items)
self.assertEqual(sorted(sample_keys), sorted(pq.keys()))
self.assertEqual(
sorted(sample_values), [pq[key] for key in pq.copy().popkeys()])
