Hi everyone, I am currently learning data structures and I am satisfied with the training provided by codecademy, but when I tried the same codes in VSCode, I realized that it did not work. Can you help me ?
node.py codes below
class Node:
def __init__(self, value, next_node=None):
self.value = value
self.next_node = next_node
def set_next_node(self, next_node):
self.next_node = next_node
def get_next_node(self):
return self.next_node
def get_value(self):
return self.value
# Add your code below:
yacko = Node("likes to yak")
wacko = Node("has a penchant for hoarding snacks")
dot = Node("enjoys spending time in movie lots")
yacko.set_next_node(wacko) # yacko.next_node = wacko
wacko.set_next_node(dot) # wacko.next_node = dot
# yacko --- wacko --- dot
wackos_data = yacko.get_next_node().get_value()
# yacko.get_next_node() returns next_node and it's equal to wacko
# wacko.get_value() returns wacko's value
dots_data = wacko.get_next_node().get_value()
print(wackos_data) # has a penchant for hoarding snacks
print(dots_data) # enjoys spending time in movie lots
queue.py codes below
from node import Node
class Queue:
def __init__(self, max_size=None):
self.head = None
self.tail = None
self.max_size = max_size
self.size = 0
def enqueue(self, value):
if self.has_space():
item_to_add = Node(value)
print("Adding " + str(item_to_add.get_value()) + " to the queue!")
if self.is_empty():
self.head = item_to_add
self.tail = item_to_add
else:
self.tail.set_next_node(item_to_add)
self.tail = item_to_add
self.size += 1
else:
print("Sorry, no more room!")
def dequeue(self):
if self.get_size() > 0:
item_to_remove = self.head
print(str(item_to_remove.get_value()) + " is served!")
if self.get_size() == 1:
self.head = None
self.tail = None
else:
self.head = self.head.get_next_node()
self.size -= 1
return item_to_remove.get_value()
else:
print("The queue is totally empty!")
def peek(self):
if self.size > 0:
return self.head.get_value()
else:
print("No orders waiting!")
def get_size(self):
return self.size
def has_space(self):
if self.max_size == None:
return True
else:
return self.max_size > self.get_size()
def is_empty(self):
return self.size == 0
print("Creating a deli line with up to 10 orders...\n------------")
deli_line = Queue(10)
print("Adding orders to our deli line...\n------------")
deli_line.enqueue("egg and cheese on a roll")
deli_line.enqueue("bacon, egg, and cheese on a roll")
deli_line.enqueue("toasted sesame bagel with butter and jelly")
deli_line.enqueue("toasted roll with butter")
deli_line.enqueue("bacon, egg, and cheese on a plain bagel")
deli_line.enqueue("two fried eggs with home fries and ketchup")
deli_line.enqueue("egg and cheese on a roll with jalapeos")
deli_line.enqueue("plain bagel with plain cream cheese")
deli_line.enqueue("blueberry muffin toasted with butter")
deli_line.enqueue("bacon, egg, and cheese on a roll")
# ------------------------ #
# Uncomment the line below:
deli_line.enqueue("western omelet with home fries")
# ------------------------ #
print("------------\nOur first order will be " + deli_line.peek())
print("------------\nNow serving...\n------------")
deli_line.dequeue()
deli_line.dequeue()
deli_line.dequeue()
deli_line.dequeue()
deli_line.dequeue()
deli_line.dequeue()
deli_line.dequeue()
deli_line.dequeue()
deli_line.dequeue()
deli_line.dequeue()
# ------------------------ #
# Uncomment the line below:
deli_line.dequeue()
# ------------------------ #
Errors that I get
