Python使用修饰器进行异常日志记录操作示例

时间:2022-09-15 10:49:18

本文实例讲述了Python使用修饰器进行异常日志记录操作。分享给大家供大家参考,具体如下:

当脚本中需要进行的的相同的异常操作很多的时候,可以用修饰器来简化代码。比如我需要记录抛出的异常:

在log_exception.py文件中,

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import functools
import logging
def create_logger():
  logger = logging.getLogger("test_log")
  logger.setLevel(logging.INFO)
  fh = logging.FileHandler("test.log")
  fmt = "[%(asctime)s-%(name)s-%(levelname)s]: %(message)s"
  formatter = logging.Formatter(fmt)
  fh.setFormatter(formatter)
  logger.addHandler(fh)
  return logger
def log_exception(fn):
  @functools.wraps(fn)
  def wrapper(*args, **kwargs):
    logger = create_logger()
    try:
      fn(*args, **kwargs)
    except Exception as e:
      logger.exception("[Error in {}] msg: {}".format(__name__, str(e)))
      raise
  return wrapper

在test.py文件中:

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from log_exception import log_exception
@log_exception
def reciprocal(x):
  return 1/x
if __name__ == "__main__"
  reciprocal(0)

在test.log文件中可以看到以下错误信息:

[2017-11-26 23:37:41,012-test_log-ERROR]: [Error in __main__] msg: integer division or modulo by zero
Traceback (most recent call last):
  File "<ipython-input-43-cfa2d18586a3>", line 16, in wrapper
    fn(*args, **kwargs)
  File "<ipython-input-46-37aa8ff0ba48>", line 3, in reciprocal
    return 1/x
ZeroDivisionError: integer division or modulo by zero

参考:

1. https://wiki.python.org/moin/PythonDecorators
2. https://www.blog.pythonlibrary.org/2016/06/09/python-how-to-create-an-exception-logging-decorator/

希望本文所述对大家Python程序设计有所帮助。

原文链接:https://www.cnblogs.com/arkenstone/p/7901065.html