用python设计我的英文字典，所有的单词组成一个列表，每个单词与注释成为一个字典，程序的功能就是管理这样一组单词记录，程序有查找单词(用二分查找法在words中查找单词w)、增加单词、更新注释、删除单词、显示单词等功能

好的，下面是一个简单的实现：

words = [{'word': 'apple', 'definition': 'a round fruit with a red or green skin and firm white flesh'}, 
         {'word': 'banana', 'definition': 'a long curved fruit which grows in clusters and has soft pulpy flesh and yellow skin when ripe'},
         {'word': 'cherry', 'definition': 'a small, round fruit with a red or black skin and a hard stone'},
         {'word': 'dog', 'definition': 'a domesticated carnivorous mammal with a pointed snout and furry coat'}]

def binary_search(word, words):
    low = 0
    high = len(words) - 1
    while low <= high:
        mid = (low + high) // 2
        if words[mid]['word'] == word:
            return mid
        elif words[mid]['word'] < word:
            low = mid + 1
        else:
            high = mid - 1
    return None

def find_word(word, words):
    idx = binary_search(word, words)
    if idx is not None:
        print(words[idx]['word'], ':', words[idx]['definition'])
    else:
        print('Word not found')

def add_word(word, definition, words):
    idx = binary_search(word, words)
    if idx is not None:
        print('Word already exists')
    else:
        words.append({'word': word, 'definition': definition})
        words.sort(key=lambda x: x['word'])
        print('Word added successfully')

def update_definition(word, definition, words):
    idx = binary_search(word, words)
    if idx is not None:
        words[idx]['definition'] = definition
        print('Definition updated successfully')
    else:
        print('Word not found')

def delete_word(word, words):
    idx = binary_search(word, words)
    if idx is not None:
        del words[idx]
        print('Word deleted successfully')
    else:
        print('Word not found')

def display_words(words):
    for word in words:
        print(word['word'], ':', word['definition'])

# 测试代码
find_word('apple', words)
add_word('cat', 'a small carnivorous mammal with soft fur, a short snout, and retractable claws', words)
update_definition('dog', 'a domesticated carnivorous mammal with a pointed snout and fur', words)
delete_word('cherry', words)
display_words(words)

这个程序使用了一个列表 `words` 来存储所有的单词和注释，每个单词和注释都被存储为一个字典。主要的功能函数包括：

- `binary_search(word, words)`：用二分查找法在 `words` 中查找单词 `word`，返回单词在列表中的下标，如果找不到则返回 `None`。
- `find_word(word, words)`：查找单词并显示其注释。
- `add_word(word, definition, words)`：添加一个新单词和注释。
- `update_definition(word, definition, words)`：更新一个已有单词的注释。
- `delete_word(word, words)`：删除一个已有单词。
- `display_words(words)`：显示所有单词和注释。

你可以根据需要修改这些函数来满足自己的需求。