在Python中尝试除了块 - 如何理解异常在哪里？

Question

I have a program (not mine) that has a large try - except block. Somewhere in this block there is an exception. what is the best way to find out the exact string of code where it happens?

Answer 1

You can use print_exc in the except block

import traceback
traceback.print_exc()

Example:

import traceback
try:
    pass
    pass
    pass
    pass
    pass
    raise NameError("I dont like your name")
    pass
    pass
    pass
    pass
    pass
except Exception, e:
    traceback.print_exc()

Output

Traceback (most recent call last):
  File "/home/thefourtheye/Desktop/Test.py", line 8, in <module>
    raise NameError("I dont like your name")
NameError: I dont like your name

Answer 2

Ah, if you don't want an exception to be raised, you can just have the error message, then pass:

>>> try:
    raise ValueError("A stupid error has occurred")
except Exception as e:
    the_error = str(e)
    pass

>>> the_error
'A stupid error has occurred'