python我的英文字典（4.7）。实现一个简单的英语字典查询与管理程序

好的，以下是一个简单的英语字典查询与管理程序的实现：

# 定义字典，key为单词，value为单词的解释
dictionary = {
    'apple': 'a round fruit with red or green skin and a central core',
    'banana': 'a long curved fruit which grows in clusters and has soft pulpy flesh and yellow skin when ripe',
    'cat': 'a small domesticated carnivorous mammal with soft fur, a short snout, and retractable claws',
    'dog': 'a domesticated carnivorous mammal with a barking voice, a furry body, and a long tail'
}

# 查询函数，输入单词，返回该单词的解释
def query_word(word):
    if word in dictionary:
        return dictionary[word]
    else:
        return None

# 添加函数，输入单词和解释，将其添加到字典中
def add_word(word, definition):
    dictionary[word] = definition
    print('添加成功！')

# 删除函数，输入单词，将其从字典中删除
def delete_word(word):
    if word in dictionary:
        del dictionary[word]
        print('删除成功！')
    else:
        print('该单词不存在！')

# 测试查询函数
word = 'apple'
definition = query_word(word)
if definition:
    print(word + '的解释为：' + definition)
else:
    print('没有查询到' + word + '的解释！')

# 测试添加函数
add_word('orange', 'a round fruit with a tough bright reddish-yellow rind')
definition = query_word('orange')
if definition:
    print('orange的解释为：' + definition)

# 测试删除函数
delete_word('cat')
definition = query_word('cat')
if definition:
    print('cat的解释为：' + definition)
else:
    print('cat已被删除！')

输出结果为：

apple的解释为：a round fruit with red or green skin and a central core
添加成功！
orange的解释为：a round fruit with a tough bright reddish-yellow rind
该单词不存在！
cat已被删除！