(Homework Solution): Question: Using the following class definitions, write a count method for the LinkedList class, that takes …

Using the following class definitions, write a count method for the LinkedList class,

that takes a list cargo item as an argument and returns the number of times the item

occurs in the list.

class Node:

def __init__(self, cargo=None, next=None):

self.cargo = cargo

self.next = next

def __str__(self):

return str(self.cargo)

class LinkedList:

def __init__(self):

self.length = 0

self.head = None

def addFirst(self, cargo):

node = Node(cargo)

node.next = self.head

self.head = node

self.length = self.length + 1

Expert Answer

Below is the code an the newly added part is in bolds

class Node:
def __init__(self, cargo=None, next=None):
self.cargo = cargo
self.next = next
def __str__(self):
return str(self.cargo)
class LinkedList:
def __init__(self):
self.length = 0
self.head = None
def addFirst(self, cargo):
node = Node(cargo)
node.next = self.head
self.head = node
self.length = self.length + 1
def Ocuurence(self,cargo):
temp = self.head
count = 0
while temp != None:
if temp.cargo == cargo:
count = count + 1
temp = temp.next
return count

#part of creating a new linked list and testing
ll = LinkedList()
ll.addFirst(“a”)
ll.addFirst(“a”)
ll.addFirst(“b”)
# prints the occurence of letter “a” in a linked list of a a b
print(ll.Ocuurence(“a”))
Activities sublime Text ▼ Thu 14:12 ?49自▼ /ch.py (pulkit) -Sublime Text (UNREGISTERED) File Edit Selection Find View Goto Tools Project Preferences Help Fo abc.txt che ch.py chegg.cpp 1 class Node: def-init-(self, cargo-None, next-None): self.cargo = cargo self.next next def str (self): return str(self.cargo) 9 class LinkedList: 10 def init (self): self,length = θ self.headニNone 12 13 14 15 16 17 18 def addFirst(self, cargo): node = Node (cargo) node.next self.head self.head node selflength self.length+1 20 21 def Ocuurence(self,cargo): temp self.head count while temp != None: 23 24 25 26 27 28 29 0 LinkedList 31 l1.addFirst( a 32 1l.addFirst(a) 33 ll.addFirst(b) 34 35 # prints the occurence of letter a in a linked list of a a b 36 print (11.0cuurence(a)) if temp.cargocargo: count count + 1 temp temp.next return count cuurence(a) Line 36, Column 25 Tab Size: 4 PythonHope this helps, please give an upvote if you feel satisfied.

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