Question

我打算使用trie数据结构实现自动完成功能。我想将Trie转换为JSON格式。

class Trie(object):
"""Class representing the structure of trie"""
   def __init__(self):
      self.children={}     #Links to other nodes
      self.isEndOfWord=False

这是我的trie程序的输出

[
    ('Z', <search_trie.Trie object at 0x7f3350f32c50>),
    ('j', <search_trie.Trie object at 0x7f3353e77da0>),
    ('z', <search_trie.Trie object at 0x7f3350f32be0>),
    ('M', <search_trie.Trie object at 0x7f33538eb668>)
]

其中：

'Z'-character stored in the trie node

<search_trie.Trie object at 0x7f3350f32c50> -points to other node

如何将其转换为JSON格式？我不希望该对象地址出现在JSON中。如何从地址中提取节点并将其包含在JSON中？

编辑：这是我的代码。为了避免将节点存储为引用，应该怎么做？如果我可以存储实际的对象值而不是地址，则将其转换为JSON将会很简单。

from functools import reduce
class Trie(object):
    """Class representing the trie"""
    def __init__(self):
        self.children={}
        self.isEndOfWord=False

    def add(self,char):  #Adds a character to dictionary and creates a new node 
        self.children[char]=Trie()

    def insert(self,word): #Insert a new word to the trie
        node=self
        for char in word:
            if char not in node.children:
                node.add(char)
            node=node.children[char]
        node.isEndOfWord=True

    def search(self, word): #Search for a particular word in a trie
        node = self
        for char in word:
            if char not in node.children:
                return False
            node = node.children[char]
        return node.isEndOfWord

    def all_suffixes(self,prefix):
        results = set()
        if self.isEndOfWord:
            results.add(prefix)
        if not self.children: 
            return results
        return reduce(lambda a, b: a | b, [node.all_suffixes(prefix + char) for (char, node) in self.children.items()]) | results

    def autocomplete(self, prefix):
        node = self
        for char in prefix:
            if char not in node.children:
                return set()
            node = node.children[char]
        return list(node.all_suffixes(prefix))

将Trie转换为JSON格式

0 个答案: