def search(self, word): index = self.hash_function(word) bucket = self.table[index] found_meanings = [] for w, meanings in bucket: if w == word: found_meanings.extend(meanings) return found_meanings if found_meanings else None def _save_word_to_file(self, word, pos, meaning): filename = f'dictionary/{word[0].lower()}.txt' with open(filename, 'a') as file: file.write(f"{word}\t{pos}\t{meaning}\n") def _delete_word_from_file(self, word): filename = f'dictionary/{word[0].lower()}.txt' with open(filename, 'r') as file: lines = file.readlines() with open(filename, 'w') as file: for line in lines: w, _, _ = line.strip().split('\t') if w != word: file.write(line)的意思
时间: 2024-02-15 10:28:27 浏览: 32
这段代码是一个Python类的两个私有方法,用于字典的存储和删除。其中,search方法接受一个单词作为参数,通过哈希函数将其映射到一个桶中,然后在该桶中查找单词并返回其含义。如果找不到单词,返回None。_save_word_to_file方法接受一个单词、词性和含义作为参数,将其写入以单词首字母为文件名的txt文件中。_delete_word_from_file方法接受一个单词作为参数,从相应的txt文件中删除该单词的所有行。
相关问题
import os class HashTable: def __init__(self): self.size = 26 self.table = [[] for _ in range(self.size)] def hash_function(self, key): return ord(key[0].lower()) - ord('a') def insert(self, word, meanings): index = self.hash_function(word) bucket = self.table[index] for i, (w, m) in enumerate(bucket): if w == word:这段代码的用处
这段代码实现的是一个哈希表(HashTable),其中包含了哈希函数(hash_function)和插入操作(insert)。哈希函数将输入的字符串(word)转化为一个索引值 index,然后将其插入到哈希表中对应的列表(bucket)中。如果已经存在相同的键值(word),则更新其对应的值(meanings)。这样可以通过键值快速地查找对应的值。这个哈希表的实现方式是通过使用 Python 中的列表(list)来实现的。
class Proposition: def __init__(self, name): self.name = name self.value = None def __str__(self): return self.name def __hash__(self): return hash(str(self))
class Proposition:
def __init__(self, name):
self.name = name
self.value = None
def __str__(self):
return self.name
def __hash__(self):
return hash(str(self))