Python使用Flask创建 REST API的实现步骤

pip install Flask

flask-rest-api/
│
├── app.py
└── requirements.txt

from flask import Flask, jsonify, request
 
# 初始化 Flask 应用
app = Flask(__name__)
 
# 模拟数据存储
data_store = [
    {"id": 1, "name": "Alice"},
    {"id": 2, "name": "Bob"}
]
 
# 获取所有用户
@app.route('/users', methods=['GET'])
def get_users():
    return jsonify(data_store)
 
# 获取单个用户
@app.route('/users/', methods=['GET'])
def get_user(user_id):
    user = next((item for item in data_store if item["id"] == user_id), None)
    if user:
        return jsonify(user)
    else:
        return jsonify({"error": "User not found"}), 404
 
# 添加新用户
@app.route('/users', methods=['POST'])
def add_user():
    new_user = request.get_json()
    data_store.append(new_user)
    return jsonify(new_user), 201
 
# 更新现有用户
@app.route('/users/', methods=['PUT'])
def update_user(user_id):
    user = next((item for item in data_store if item["id"] == user_id), None)
    if user:
        updated_data = request.get_json()
        user.update(updated_data)
        return jsonify(user)
    else:
        return jsonify({"error": "User not found"}), 404
 
# 删除用户
@app.route('/users/', methods=['DELETE'])
def delete_user(user_id):
    global data_store
    data_store = [item for item in data_store if item["id"] != user_id]
    return jsonify({"message": "User deleted"}), 200
 
# 启动应用
if __name__ == '__main__':
    app.run(debug=True)

python app.py