from flask import Flask, jsonify , request,render_template,app = Flask(__name__)app.config['JSON_AS_ASCII'] = Falsebooks = [{"id": 1, "name": '三国演义'},{"id": 2, "name": '水浒传'},{"id": 3, "name": '西游记'},{"id": 4, "name": '红楼梦'},
]@app.route('/')
def hello_world():return 'hello world'@app.route('/books/list')
def book_list():# return books # 直接返回books会报错的，类型格式不支持return jsonify(books) # 直接返回books会报错的，类型格式不支持
'''
@app.route('/book/<int:book_id>')#根据id获取字典里其中一个值
def book_detail(book_id):for book in books:if book_id == book['id']:return bookreturn f"id:{book_id}的图书不存在！"
'''
@app.route('/book/<int:book_id>')#根据id获取字典里其中一个值
def book_detail(book_id):for book in books:if book_id == book['id']:return bookif book_id != book['id'] :#这里book_id != book 不能和book_id == book 放在同一级（判断会出错，除了1，其他id都会报不存在：因为在同一级， book_id 与 book['id']会一直不等），return f"id:{book_id}的图书不存在！"if __name__ == '__main__':app.run(debug=True)http://127.0.0.1:5000/books/list
http://127.0.0.1:5000/book/1
http://127.0.0.1:5000/book/9
