Einführung in Python-Pakete und Protokollierung

bake            
    ├── __init__.py       
    ├── api               
        ├── __init__.py
        ├── policy.py
        └── versions.py
  ├── cmd             
    ├── __init__.py
    └── manage.py
  └── db                
      ├── __init__.py
      └── models.py

import bake.api.policy
bake.api.policy.get()
#导入的名字太长了，可以起别名
import bake.api.policy as p
p.get()
#from 导入在__init__.py修改
from . import policy
#我们需要在policy文件中向sys.path添加了当前的路径
import os
import sys
sys.path.insert(os.path.dirname(__file__))
#print(__file__)查看一下
#使用__all__,在__init__.py中
__all__ = ["policy"]
#或
from . import policy

import logging
logging.debug('debug message')
logging.info('info message')
logging.warning('warning message')
logging.error('error message')
logging.critical('critical message')

import logging
logging.basicConfig(level = logging.DEBUG,
                    format = '%(astime)s %(filename)s [line:%(lineno)d] %(levelname)s %(message)s',
                    datefmt = '%Y-%m-%d %H:%M:%S',
                    filename = 'test.log',
                    filemode = 'a')
dic = {"key":123}
logging.debug(dic)
num = 100
logging.info(f"用户余额：{num - 50}")
try:
    num = int(input("请输入数字："))
except Exception as e:
    logging.warning("e")
logging.error('error message')
logging.critical('critical message')

import logging
logger = logging.getLogger()
# 创建一个logger
fh = logging.FileHandler('test.log',mode="a",encoding='utf-8')   # 文件
ch = logging.StreamHandler()   # 屏幕
formatter = logging.Formatter('%(asctime)s - %(name)s - %(filename)s - [line:%(lineno)d] -  %(levelname)s - 
%(message)s')
# 将屏幕和文件都是用以上格式
logger.setLevel(logging.DEBUG)
# 设置记录级别
fh.setFormatter(formatter)
# 使用自定义的格式化内容
ch.setFormatter(formatter)
logger.addHandler(fh) #logger对象可以添加多个fh和ch对象
logger.addHandler(ch)
logger.debug('logger debug message')
logger.info('logger info message')
logger.warning('logger warning message')
logger.error('logger error message')
logger.critical('logger critical message')