0
Online
173
Users
134
Topics
385
Posts
Need Help with Creating a LinkedList in Python

class Node: def _init_(self,data): self.data=data self.next=None
class LinkedList: def _init_(self): self.head=None def insert(self,newnode): if self.head is None: self.head=newnode else: temp=self.head while temp.next!=None: temp=temp.next temp.next=newnode def printlist(self): temp=self.head if temp==None: print("empty list") return 0 while temp.next!=None: print(temp.data) temp=temp.next firstnode=Node("Sita") linkedlist=LinkedList() linkedlist.insert("john") secondnode=Node("Ben") linkedlist.insert(secondnode) thirdnode=Node("Matthew") linkedlist.insert(thirdnode) linkedlist.printlist()

Where to start...
I am not a python guy but here is what I have noticed.
Constructor
Add extra underscores (one before and one after) to both constructors
So it should look like this:def __init__(self,data): def __init__(self):
Adding a Node instead a String
So replace
linkedlist.insert("john")
with
linkedlist.insert(firstnode)
Print Last Element
Don't forget to print the last element once you are done iterating over the linkedlist
So add the following line to the end of the while loop
print(temp.data)
Final Code for a python LinkedList
class Node: def __init__(self,data): self.data=data self.next=None class LinkedList: def __init__(self): self.head=None def insert(self,newnode): if self.head is None: self.head=newnode else: temp=self.head while temp.next!=None: temp=temp.next temp.next=newnode def printlist(self): temp=self.head if temp==None: print("empty list") return 0 while temp.next!=None: print(temp.data) temp=temp.next print(temp.data) firstnode=Node("Sita") linkedlist=LinkedList() linkedlist.insert(firstnode) secondnode=Node("Ben") linkedlist.insert(secondnode) thirdnode=Node("Matthew") linkedlist.insert(thirdnode) linkedlist.printlist()