日志的一般用法 log

import logging

# logging.warning("warning: error")
# logging.critical("112233455")
# logging.basicConfig(filename="sample_logging",level=logging.debug("111")) #在debug级别之上的信息才被记录
# logging.basicConfig(format='%(asctime)s %(message)s',datefmt='%d/%m/%Y %h:%M%S') #添加时间格式
# logging.warning("is when this event was logged")

logger = logging.getLogger("log_test")  # 创建logger，先获取logger对象
logger.setLevel(logging.DEBUG)  # 设定一个全局的日志级别
ch = logging.StreamHandler()  # 把日志打印到屏幕
ch.setLevel(logging.WARNING)  # 给屏幕上的日志设置级别

fh = logging.FileHandler("info.log")
fh.setLevel(logging.DEBUG)

formatter = logging.Formatter('%(asctime)s - %(name)s -%(levelname)s -%(message)s')

ch.setFormatter(formatter)
fh.setFormatter(formatter)

logger.addHandler(ch)  # 告知日志打印到指定的目录里
logger.addHandler(fh)

logger.info("info")
logger.debug("debug")
logger.warning("warning")
logger.error("error")
logger.critical("critical")