Created
March 22, 2015 17:47
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#!/usr/bin/env python | |
# -*- coding: utf-8 -*- | |
class NodeTrie: | |
def __init__(self,data): | |
self.data = data | |
self.pointers = [None for i in xrange(97,123)] | |
class Trie: | |
def __init__(self): | |
self.sqr = NodeTrie(False) | |
self.actPtr = self.sqr | |
def _find(self,string): | |
self.actPtr,find,tord = self.sqr,False,ord | |
while self.actPtr!=None and find==False: | |
if len(string)==0: find=self.actPtr.data; self.actPtr=None | |
else: | |
self.actPtr = self.actPtr.pointers[tord(string[0])-97] | |
if self.actPtr!=None: string = string[1:] | |
return find | |
def _insert(self,string): | |
self.actPtr,index,tord = self.sqr,0,ord | |
for char in string[0:-1]: | |
index = tord(char)-97 | |
if self.actPtr.pointers[index]==None: self.actPtr.pointers[index] = NodeTrie(False) | |
self.actPtr = self.actPtr.pointers[index] | |
index = tord(string[-1])-97 | |
if self.actPtr.pointers[index]==None: self.actPtr.pointers[index] = NodeTrie(True) | |
else: self.actPtr.pointers[index].data = True | |
def _delete(self,string): | |
if self._find(string)==False: return False | |
self.actPtr,tord = self.sqr,ord | |
for char in string[0:-1]: self.actPtr = self.actPtr.pointers[tord(char)-97] | |
self.actPtr.pointers[tord(string[-1])-97].data = False | |
return True | |
def __str__(self): | |
pass | |
if __name__ == "__main__": | |
MyTrie = Trie() | |
print "Insertado hola." | |
MyTrie._insert("hola") | |
print "Encontrado hola? -> " , MyTrie._find("hola") | |
print "Encontrado aloha? -> " , MyTrie._find("aloha") | |
print "Borrado hola? -> " , MyTrie._delete("hola") | |
print "Enontrado hola? -> " , MyTrie._find("hola") |
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