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7.SingleLinkedList_Unordered.py
113 lines (95 loc) · 2.27 KB
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7.SingleLinkedList_Unordered.py
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class Node:
def __init__(self, data):
self.data = data
self.next = None
def setData(self, data):
self.data = data
def setNext(self, next):
self.next = next
def getData(self):
return self.data
def getNext(self):
return self.next
def __str__(self):
return "{}".format(self.data)
class UnorderedList:
def __init__(self):
self.head = None
self.tail = None
def add(self, item):
newNode = Node(item)
if self.head == None:
self.tail = newNode
newNode.setNext(self.head)
self.head = newNode
def size(self):
count = 0
if self.head == None:
return 0
else:
temp = self.head
while temp != None:
temp = temp.getNext()
count += 1
return count
def search(self, item):
found = False
if self.head == None:
return False
else:
temp = self.head
while temp != None:
if temp.getData() == item:
found = True
temp = temp.getNext()
return found
def remove(self, item):
if self.head == None:
return False
else:
found = False
temp = self.head
previous = None
while temp != None and found == False:
if temp.getData() == item:
found = True
else:
previous = temp
temp = temp.getNext()
if previous == None:
self.head = temp.getNext()
else:
previous.setNext(temp.getNext())
return True
def listAll(self):
temp = self.head
count = 0
while temp != None:
print(temp, end="->")
temp = temp.getNext()
def append(self, item):
temp = self.head
while not temp == None:
last = temp
temp = temp.getNext()
newNode = Node(item)
print(newNode)
print(last.getNext())
last.setNext(newNode)
self.tail = newNode
def appendv2(self, item):
newNode = Node(item)
self.tail.setNext(newNode)
self.tail = newNode
myList = UnorderedList()
myList.add(10)
myList.add(20)
myList.add(40)
print(myList.size())
print(myList.search(20))
print(myList.size())
myList.append(50)
myList.appendv2(60)
print("-----")
myList.listAll()
print("\n-----")