from flask import Flask, jsonify , request,render_template,

app = Flask(__name__)

app.config['JSON_AS_ASCII'] = False
 
books = [
    {"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 book
    return 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 book
    if 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