class Node:
def __init__(self,initdata):
self.data = initdata
self.next = None
def getData(self):
return self.data
def getNext(self):
return self.next
def setdata(self,newData):
self.data = newData
def setNext(self,newnext):
self.next = newnext
class UnorderedList:
def __init__(self):
self.head = None
def isEmpty(self):
return self.head == None
## Adds next item on to the head
def add(self,item):
temp = Node(item)
temp.setNext(self.head)
self.head = temp
def length(self):
current = self.head
count = 0
while current !=None:
count = count + 1
current = current.getNext()
return count
def search(self,item):
current = self.head
found = False
while current != None and not found:
if current.getData()== item:
found =True
else:
current = current.getNext()
return found
def remove(self,item):
'''Removes item from the List'''
current = self.head
previous = None
found = False
while not found:
if current.getData() == item:
found = True
else:
previous = current
current = current.getNext()
if previous == None:
self.head = current.getNext()
else:
previous.setNext(current.getNext())
def getIndex(self,item):
current = self.head
index = 0
found = False
while current != None and not found:
if current.getData()== item:
found = True
else:
current = current.getNext()
index = index + 1
return index
def append(self,item):
'''Adds an item to the end of the List'''
current = self.head
previous = None
while current.getNext() != None:
previous = current
current = current.getNext()
if current.getNext() == None:
previous = previous.setNext(current)
current = current.setNext(item)
myList = UnorderedList()
myList.add(31)
myList.add(77)
myList.add(17)
myList.add(93)
myList.add(26)
myList.add(54)
print(myList.length())
myList.append(24)
print(myList.length())
myList.search(24)
Output
Python 3.1 (r31:73574, Jun 26 2009, 20:21:35) [MSC v.1500 32 bit (Intel)]
Type "help", "copyright", "credits" or "license" for more information.
>>> [evaluate unorderedList.py]
6
builtins.AttributeError: 'int' object has no attribute 'getNext'
>>>
What do I need to do the append method to fix it?
--
Dave Merrick
merrick...@gmail.com
Ph 03 3423 121
Cell 027 3089 169
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