def level_order_traversal(node):
if node == None:
return
queue1 = Queue()
queue1.insert(node)
while not queue1.is_empty():
temp = queue1.remove()
print temp,
if temp.left:
queue1.insert(temp.left)
if temp.right:
queue1.insert(temp.right)
def size_of_tree_queue(node):
if node == None:
return
queue1 = Queue()
queue1.insert(root)
size = 0
while not queue1.is_empty():
temp = queue1.remove()
size += 1
if temp.left:
queue1.insert(temp.left)
if temp.right:
queue1.insert(temp.right)
return size
def is_binary_tree_complete(node):
if node == None:
#probably tree is empty
return True
queue = Queue()
queue.insert(node)
while not queue.is_empty():
temp = queue.remove()
# if one of the children is None
if ((temp.left== None and temp.right) or
(temp.right== None and temp.left)):
return False
elif temp.left and temp.right:
queue.insert(temp.left)
queue.insert(temp.right)
return True
def binary_tree_count_leaves_old(self, root):
if not root:
return 0
queue = Queue()
queue.insert(root)
leaf_count = 0
while queue.size()>0:
node = queue.remove()
if self.is_leaf(node):
leaf_count +=1
if node.left:
queue.insert(node.left)
if node.right:
queue.insert(node.right)
return leaf_count
def binary_tree_invert(root):
if not root:
return
queue = Queue()
queue.insert(root)
while not queue.is_empty():
temp = queue.remove()
if temp.left:
queue.insert(temp.left)
if temp.right:
queue.insert(temp.right)
transfer = temp.left
temp.left = temp.right
temp.right = transfer
return root
def _shortest_path(self, start_node:"Hashable", queue:Queue,
verbose:bool=False) -> "Graph":
father = {}
distance = {}
if verbose:
node_list = [n for n in self.list_nodes()]
print("{:^5}|{:^5}".format("u","d") +
(" " * 5 * (len(node_list)-1)) +
"|{:^5}".format("p") +
(" " * 5 * (len(node_list)-1)) +
"|{:^5}".format("Q"))
print("{:^5}".format("") +
("|"+ ("{:^5}"*len(node_list)).format(*node_list)) *2 +
"|")
print("-"*5 + "|" +
("-"*5*len(node_list) + "|")*2)
for node in self.list_nodes():
distance[node] = float("inf")
father[node] = None
distance[start_node] = 0
father[start_node] = None
queue.put(start_node, distance[start_node])
while not queue.empty():
node = queue.get()
for neighbour in self.forward_star(node):
connection_weight = self.get_weight(node, neighbour)
if not connection_weight:
connection_weight = 0
if distance[node] + connection_weight < distance[neighbour]:
distance[neighbour] = distance[node] + connection_weight
father[neighbour] = node
if not queue.is_in(neighbour):
queue.put(neighbour, distance[neighbour])
if verbose:
d_list = [distance[n] for n in node_list]
f_list = [father[n] for n in node_list]
p_list = d_list + f_list
row_format = "{:^5}|" + (("{:^5}"*len(node_list)) + "|")*2
print(row_format.format(node, *p_list),queue)
result = Graph()
result.add_node(start_node,value=0)
for node in self.list_nodes():
if father[node] != None:
result.add_connection(father[node], node)
result.set_node_value(node, distance[node])
return result
def height_of_tree(head):
if head == None:
return 0
queue = Queue()
queue.insert(head)
height = 0
while(1):
children_count = queue.size()
if children_count == 0:
return height
else:
height += 1
while(children_count>0):
node = queue.remove()
if node.left:
queue.insert(node.left)
if node.right:
queue.insert(node.right)
children_count -= 1
def binary_tree_connect_nodes_at_same_level_to_linked_list(node):
if node == None:
return
queue1 = Queue()
queue1.insert(node)
linked_list = None
node_count = 1
temp_list = []
while not queue1.is_empty():
node_count = queue1.size()
temp = queue1.remove()
linked_list = insert_in_linked_list(linked_list, temp)
node_count -= 1
if temp.left:
temp_list.append(temp.left)
if temp.right:
temp_list.append(temp.right)
if node_count == 0:
print_linked_list(linked_list)
for e in temp_list:
queue1.insert(e)
temp_list = []
linked_list = None
def __init__(self, *args):
Queue.__init__(self, *args)
