diff --git a/基本结构/042 restful/tf-35-app.py b/基本结构/042 restful/tf-35-app.py
new file mode 100644
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+++ b/基本结构/042 restful/tf-35-app.py	
@@ -0,0 +1,76 @@
+# -*- coding: utf-8 -*-
+from flask import Flask, request, jsonify, abort
+from functools import lru_cache
+from cppy.cp_util import *
+from functools import cache
+
+app = Flask(__name__)
+
+# 模拟数据库
+books_db = []
+
+# 用于缓存用户数据库的装饰器
+@lru_cache(maxsize=None)
+def get_books_db():
+    return books_db
+
+#查询所有资源
+@app.route('/books', methods=['GET'])
+def get_books():
+    return jsonify(get_books_db())
+
+#查询某个资源
+@app.route('/books/<int:book_id>', methods=['GET'])
+def get_book(book_id):
+    book = next((book for book in get_books_db() if book['id'] == book_id), None)
+    if book is None:
+        abort(404)
+    return jsonify(book['content'])
+
+
+# 创建或更新新资源
+@app.route('/books/<int:book_id>', methods=['PUT'])
+def update_book(book_id):
+    global books_db
+    book_to_update = request.json
+    print(book_to_update)
+    books_db = get_books_db()
+
+    book = next((book for book in books_db if book['id'] == book_id), None)
+
+    if book is None:
+        # 如果资源不存在，创建新资源
+        books_db.append(book_to_update)
+    else:
+        # 如果资源存在，更新资源
+        book.update(book_to_update)
+        # 清除缓存的数据库
+        cache.delete(get_books_db)
+
+    return jsonify(books_db), 200
+
+#操作一个资源
+@app.route('/books/<int:book_id>/word_frequency', methods=['GET'])
+def word_frequency(book_id):
+    global books_db
+    book = next((book for book in get_books_db() if book['id'] == book_id), None)
+    filepath = book['content']
+    word_list = extract_file_words(filepath)
+    word_frequency = get_frequencies(word_list)
+    word_frequency = sort_dict(word_frequency)
+    print_word_freqs(word_frequency)
+    return jsonify(word_frequency), 200
+
+@app.route('/books/<int:book_id>', methods=['DELETE'])
+def delete_book(book_id):
+    global books_db
+    books_db = [book for book in books_db if book['id'] != book_id]
+
+    if len(books_db) == len([l for l in books_db if l['id'] == book_id]):
+        abort(404)  # 用户不存在
+
+    return jsonify({'message': f'book {book_id} deleted'}), 200
+
+if __name__ == '__main__':
+    app.run(debug=True)
+