# logging 默认设置的级别 是warning
# 设置成哪个级别 ，就会打印这个级别 及以上级别的日志
logging.basicConfig(level=logging.DEBUG)
logging.debug("这是debug日志")
logging.warning('Watch out!') # will print a message to the console
logging.info('I told you so') # will not print anything
logging.error("这是一条error级别的日志")
保存日志到文件
logging.basicConfig(filename='myapp.log', level=logging.INFO)
import logging
logging.basicConfig(filename='example.log', level=logging.DEBUG)
logging.debug('This message should go to the log file')
logging.info('So should this')
logging.warning('And this, too')
logging.error('And non-ASCII stuff, too, like Øresund and Malmö')
设置时间格式
logging.basicConfig(filename='myapp.log', level=logging.INFO,format='%(asctime)s [%(levelname)s] %(message)s (%(filename)s:%(lineno)s)', datefmt='%m/%d/%Y %I:%M:%S %p')
import logging
# logging.basicConfig(format='%(asctime)s %(message)s')
# logging.warning('is when this event was logged.')
# logging.basicConfig(format='%(asctime)s %(message)s', datefmt='%m/%d/%Y %I:%M:%S %p')
# logging.warning('is when this event was logged.')
logging.basicConfig(filename='myapp.log',
level=logging.INFO,
format='%(asctime)s [%(levelname)s] %(message)s (%(filename)s:%(lineno)s)', datefmt='%m/%d/%Y %I:%M:%S %p')
logging.warning('is when this event was logged.')
logging.debug("这是debug日志")
logging.info("这是debug日志")
python 日志进阶用法
日志记录的流程
封装日志公共模块
日志配置文件
python 日志进阶
image 1536×448 71.1 KB python 日志记录流程
image 1170×530 25.3 KB import logging
# create logger
logger = logging.getLogger('simple_example')
logger.setLevel(logging.DEBUG)
# create console handler and set level to debug
# 流处理器
ch = logging.StreamHandler()
# 文件处理器
# ch = logging.FileHandler("mylog.log",encoding='utf-8')
ch.setLevel(logging.DEBUG)
# create formatter
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
# add formatter to ch
ch.setFormatter(formatter)
# add ch to logger
logger.addHandler(ch)
# 定义一个文件处理器
# 文件处理器
ch_file = logging.FileHandler("mylog.log",encoding='utf-8')
ch_file.setLevel(logging.DEBUG)
# create formatter
formatter1 = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
# add formatter to ch
ch_file.setFormatter(formatter1)
# add ch to logger
logger.addHandler(ch_file)
# 'application' code
logger.debug('debug message')
logger.info('info message')
logger.warning('warn message')
logger.error('error message')
logger.critical('critical message')
python 日志定义
官网： https://docs.python.org/zh-cn/3/howto/logging.html
import logging
import os
# create logger 创建一个logger 记录器
logger = logging.getLogger(os.path.basename(__file__))
logger.setLevel(logging.DEBUG)
# create console handler and set level to debug
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
# create formatter
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
# add formatter to ch
ch.setFormatter(formatter)
# add ch to logger
logger.addHandler(ch)
# 'application' code
logger.debug('debug message')
logger.info('info message')
logger.warning('warn message')
logger.error('error message')
logger.critical('critical message')
封装日志公共函数
https://ceshiren.com/t/topic/13564
import logging
import os
# 定义一个记录器
def get_logger():
# create logger
print(os.path.basename(__file__))
# 记录器
logger = logging.getLogger(os.path.basename(__file__))
logger.setLevel(logging.DEBUG)
# create console handler and set level to debug
# 文件处理器
ch = logging.FileHandler(filename='mylog.log', encoding="utf-8")
ch.setLevel(logging.DEBUG)
# create formatter
# 定义格式器
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
# add formatter to ch
ch.setFormatter(formatter)
# add ch to logger
logger.addHandler(ch)
return logger
logger = get_logger()
def log_info(message):
logger.info(message)
logger.debug('debug message')
# logger.info('info message')
log_info(" log info 方法")
logger.warning('warn message')
logger.error('error message')
logger.critical('critical message')
日志配置文件https://ceshiren.com/t/topic/13564
