Python字典树实现

class Trie:
# word_end = -1

def __init__(self):
"""
Initialize your data structure here.
"""
self.root = {}
self.word_end = -1

def insert(self, word):
"""
Inserts a word into the trie.
:type word: str
:rtype: void
"""
curNode = self.root
for c in word:
if not c in curNode:
curNode[c] = {}
curNode = curNode[c]

curNode[self.word_end] = True

def search(self, word):
"""
Returns if the word is in the trie.
:type word: str
:rtype: bool
"""
curNode = self.root
for c in word:
if not c in curNode:
return False
curNode = curNode[c]

# Doesn't end here
if self.word_end not in curNode:
return False

return True

def startsWith(self, prefix):
"""
Returns if there is any word in the trie that starts with the given prefix.
:type prefix: str
:rtype: bool
"""
curNode = self.root
for c in prefix:
if not c in curNode:
return False
curNode = curNode[c]

return True

# Your Trie object will be instantiated and called as such:
# obj = Trie()
# obj.insert(word)
# param_2 = obj.search(word)
# param_3 = obj.startsWith(prefix)
---------------------

原文：https://blog.csdn.net/ANNILingMo/article/details/80879910