Question

我已经定义了一个自定义的Exception对象，并希望得到异常的行号。

class FlowException(Exception):
    pass

def something():
    print 2/3
    print 1/2
    print 2/0


try:
   something()
except Exception as e:
   raise FlowException("Process Exception", e)

现在，如果something（）中存在异常，则抛出FlowException，但它没有给出确切的行号，如何从FlowException获取行号（即;它在执行2/0时失败）？

这是输出： -

raise FlowException("Process Exception", e)
__main__.FlowException: ('Process Exception', ZeroDivisionError('integer division or modulo by zero',))
[Finished in 0.4s with exit code 1]

Answer 1

在Python 3.6上测试

class FlowException(Exception):
    pass

def something():
    raise ValueError

try:
   something()
except Exception as e:
    raise FlowException("Process Exception", e)

输出有行号：

Traceback (most recent call last):
  File "/Users/diman/PycharmProjects/invites/test.py", line 8, in <module>
    something()
  File "/Users/diman/PycharmProjects/invites/test.py", line 5, in something
    raise ValueError
ValueError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/diman/PycharmProjects/invites/test.py", line 10, in <module>
    raise FlowException("Process Exception", e)
__main__.FlowException: ('Process Exception', ValueError())

对于Python 2，尝试使用内部记录器＆＃34; .exception（）＆＃34;方法而不是使用monstrous＆＃34; sys＆＃34;模块。

import logging
logger = logging.getLogger()

try:
    something()
except Exception as e:
    logger.exception(e)
    raise FlowException("Process Exception", e)

Answer 2

traceback对象保存import sys # ... except Exception as e: trace_back = sys.exc_info()[2] line = trace_back.tb_lineno raise FlowException("Process Exception in line {}".format(line), e)属性中的信息：

functions.php

Answer 3

您可以使用 traceback 模块。

请参阅Log exception in python如何使用它。

从异常对象获取行号

3 个答案: