pip3 install logging

#!/usr/bin/env python3
# -*- coding:utf-8 -*-
 
import json
import logging
from flask import Flask, request, jsonify
 
app = Flask(__name__)
 
@app.route("/flask_api/", methods=['POST', 'GET'])
def flask_api():
  data = json.loads(request.get_data(as_text=True))
  # 打印debug级别日志
  app.logger.debug("data: %s" % (data))
  user_id = data.get("id")
  user_name = data.get("name")
  # 打印info级别日志
  app.logger.info("reply: %s" % (data))
  return jsonify({"user_id":user_id,"user_name":user_name})
 
if __name__ == '__main__':
  # 添加日志模块，将日志写入到指定文件中，打印DEBUG级别以下日志
  app.debug = True
  handler = logging.FileHandler('logs/flask.log', encoding='UTF-8')
  handler.setLevel(logging.DEBUG)
  logging_format = logging.Formatter("%(asctime)s flask %(levelname)s %(message)s")
  handler.setFormatter(logging_format)
  app.logger.addHandler(handler)
  # 启动flask服务
  app.run('0.0.0.0', 5000)