python日志调试

1.日志

• logging.debug()：最低级别，用于小细节，通常用于在诊断问题时，才会关心谢谢消息
• logging.info()：用于记录程序中一般事件的信息，或确认一切工作正常
• logging.warning()：用于表示可能的问题，它不会阻止程序的工作，但将来可能会
• logging.error()：用于记录错误，它导致程序做某事失败
• logging.critical()：最高级别，用于表示致命的错误，它导致或将导致程序完全停止工作。

示例

import logging

#filename指定日志存放文件名称
#level指定日志级别
logging.basicConfig(filename='test.txt',level=logging.DEBUG, format=' %(asctime)s - %(levelname)s - %(message)s')
logging.debug('Start of program')
def factorial(n):
    logging.debug('Start of factorial(%s%%)' % (n))
    total = 1
    for i in range(1,n + 1):
        total *= i
        logging.debug('i is ' + str(i) + ', total is ' + str(total))
    logging.debug('End of factorial(%s%%)' % (n))
    return total

print(factorial(7))
logging.debug('End of program')


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执行结果如下

 2023-07-17 17:45:27,486 - DEBUG - Start of program
 2023-07-17 17:45:27,486 - DEBUG - Start of factorial(7%)
 2023-07-17 17:45:27,486 - DEBUG - i is 1, total is 1
 2023-07-17 17:45:27,486 - DEBUG - i is 2, total is 2
 2023-07-17 17:45:27,486 - DEBUG - i is 3, total is 6
 2023-07-17 17:45:27,486 - DEBUG - i is 4, total is 24
 2023-07-17 17:45:27,486 - DEBUG - i is 5, total is 120
 2023-07-17 17:45:27,486 - DEBUG - i is 6, total is 720
 2023-07-17 17:45:27,487 - DEBUG - i is 7, total is 5040
 2023-07-17 17:45:27,487 - DEBUG - End of factorial(7%)
 2023-07-17 17:45:27,487 - DEBUG - End of program