python3 logging模块

import logging


"""单一日志的简单配置，写入日志的编码目前默认是gbk"""
logging.basicConfig(
    filename='xx.log',  # 日志文件
    format='%(asctime)s - %(name)s - %(levelname)s - %(module)s: %(message)s',
    datefmt='%Y-%m-%d %H:%M:%S',  # 日志时间格式
    level=30)  # 日志等级.30分以上的信息会记录到日志

# 5个等级.
logging.critical("严重信息")  # 50分
logging.error("错误信息")  # 40分
logging.warning("警告信息")  # 30分
logging.info("普通信息")  # 20分
logging.debug("详细信息")  # 10分

logging.log(35, "自定义消息")  # 35分

import logging


"""多个日志文件的配置"""
file_handler = logging.FileHandler('user.log', 'a', encoding='utf-8')
file_handler.setFormatter(logging.Formatter(fmt='%(asctime)s - %(name)s - %(levelname)s - %(module)s: %(message)s'))
logger1 = logging.Logger('用户信息', level=logging.ERROR)
logger1.addHandler(file_handler)  # 把logger和handler绑定在一起

file_handler2 = logging.FileHandler('sys.log', 'a', encoding='utf-8')
file_handler2.setFormatter(logging.Formatter(fmt="%(asctime)s - %(name)s - %(levelname)s - %(module)s: %(message)s"))
logger2 = logging.Logger('系统信息', level=logging.ERROR)
logger2.addHandler(file_handler2)

logger1.error('用户信息')
logger2.error('系统信息')

try:
    print(1/0)  # ZeroDivisionError: division by zero
    lst = [1, 2, 3]
    it = lst.__iter__()
    print(it.__next__())
    print(it.__next__())
    print(it.__next__())
    print(it.__next__())
except StopIteration:
    print("迭代器没数据了")
except ZeroDivisionError:
    print("除数不能为零")
except Exception:
    print("程序出错了")
finally:
    print("有没有错误都走这里")

import logging
import traceback


"""多个日志文件的配置"""
file_handler = logging.FileHandler('user.log', 'a', encoding='utf-8')
file_handler.setFormatter(logging.Formatter(fmt='%(asctime)s - %(name)s - %(levelname)s - %(module)s: %(message)s'))
logger1 = logging.Logger('用户信息', level=logging.ERROR)
logger1.addHandler(file_handler)  # 把logger和handler绑定在一起

file_handler2 = logging.FileHandler('sys.log', 'a', encoding='utf-8')
file_handler2.setFormatter(logging.Formatter(fmt="%(asctime)s - %(name)s - %(levelname)s - %(module)s: %(message)s"))
logger2 = logging.Logger('系统信息', level=logging.ERROR)
logger2.addHandler(file_handler2)

try:
    print(1/0)
except Exception:
    logger1.error(traceback.format_exc())  # format_exc() 拿到错误位置
finally:
    print("报不报错，都会走这里！")