我試圖返回一個(gè)由每個(gè)關(guān)鍵字以及每個(gè)關(guān)鍵字及其同義詞在每個(gè)文檔中出現(xiàn)的次數(shù)組成的元組列表。當(dāng)輸入只是一個(gè)字符串（例如“happy”）時(shí)，我沒有問題，但是當(dāng)我嘗試更多輸入（例如“happy”和“sad”）時(shí)，代碼只打印最后一個(gè)字符串的輸出（“sad”） ）這是我的代碼：class Entry :    def __init__(self, input_word, input_synonyms) :        self.word = input_word        self.synonyms = input_synonymse1 = Entry("sad", ["unhappy", "upset"])e2 = Entry("happy", ["cheerful", "joyful"])Thesaurus = [e1, e2]doc1 = ["the", "man", "is", "sad", "very", "sad", "and", "unhappy", "and", "upset"]doc2 = ["the", "boy", "is", "happy", "cheerful", "and", "joyful"]Corpus = [doc1, doc2]def search(keyword) :    all_words = [keyword]    for entry in Thesaurus:        if entry.word == keyword:            for word in entry.synonyms:                all_words.append(word)    store = []    for search_word in all_words:        count = 0        for document in Corpus:            for word in document:                if search_word == word:                    count = count + 1        store.append([search_word, count])    return storeinput_ = "happy" and "sad"output = search(input_)print(output)控制臺(tái)輸出：[['sad', 2], ['unhappy', 1], ['upset', 1]]預(yù)期輸出：[['happy', 1], ['cheerful', 1], ['joyful', 1], ['sad', 2], ['unhappy', 1], ['upset', 1]]有什么辦法可以解決這個(gè)問題嗎？