参考：
https://blog.csdn.net/qq_15111861/article/details/82015753

https://blog.csdn.net/energysober/article/details/53263295

建立log.yaml文件

version: 1
disable_existing_loggers: False
formatters:
    simple:
        format: "%(asctime)s - %(filename)s - %(levelname)s - %(message)s"
        datefmt: '%F %T'

handlers:
    console:
        class: logging.StreamHandler
        level: DEBUG
        formatter: simple
        stream: ext://sys.stdout
    info_file_handler:
        class: logging.handlers.TimedRotatingFileHandler
        level: DEBUG
        formatter: simple
        filename: ./mylog/log.log   #这个路径根据自己的日志存放路径填写
        interval: 1
        backupCount: 2 #most 2 extensions
        encoding: utf8
        when: H #这里是按小时生成
root:
    level: INFO
    handlers: [console, info_file_handler]

在自己的app.py中引用log.yaml

import yaml
import logging.config
import os

def setup_logging(default_path='log.yaml', default_level=logging.INFO):
    """
    Setup logging configuration
    """
    if os.path.exists("mylog"):
        pass
    else:
        os.mkdir('mylog')
    path = default_path
    if os.path.exists(path):
        with open(path, 'rt') as f:
            config = yaml.load(f.read())
        logging.config.dictConfig(config)
    else:
        logging.basicConfig(level=default_level)
        print('the input path doesn\'t exist')
setup_logging(default_path='./log.yaml')
logger = logging.getLogger()

如果读取yaml报错，查看读取文件的格式，改为utf-8读取：

    with open(path, 'rt',encoding='utf-8') as f:
            config = yaml.load(f.read())