Created
November 29, 2016 05:51
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Linked List Implementation (Python)
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class Node : | |
def __init__( self, data ) : | |
self.data = data | |
self.next = None | |
self.prev = None | |
class LinkedList : | |
def __init__( self ) : | |
self.head = None | |
def add( self, data ) : | |
node = Node( data ) | |
if self.head == None : | |
self.head = node | |
else : | |
node.next = self.head | |
node.next.prev = node | |
self.head = node | |
def search( self, k ) : | |
p = self.head | |
if p != None : | |
while p.next != None : | |
if ( p.data == k ) : | |
return p | |
p = p.next | |
if ( p.data == k ) : | |
return p | |
return None | |
def remove( self, p ) : | |
tmp = p.prev | |
p.prev.next = p.next | |
p.prev = tmp | |
def __str__( self ) : | |
s = "" | |
p = self.head | |
if p != None : | |
while p.next != None : | |
s += p.data | |
p = p.next | |
s += p.data | |
return s | |
# example code | |
l = LinkedList() | |
l.add( 'a' ) | |
l.add( 'b' ) | |
l.add( 'c' ) | |
print l | |
l.remove( l.search( 'b' ) ) | |
print l |
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