Can I get the local variables of a Python function from which an exception was thrown?

Question

I\'m writing a custom logging system for a project. If a function throws an exception, I want to log its local variables. Is it possible to access the raising function\'s

Answer 1

You can look up the local variables in the frame object, which you can get from sys.exc_info.

>>> import sys
>>> def f(a):
...     b = a - 1
...     print 1.0 / b
...
>>> try:
...     f(1)
... except Exception, e:
...     print sys.exc_info()[2].tb_next.tb_frame.f_locals
...
{'a': 1, 'b': 0}

You'll have to include the appropriate number of tb_nexts depending on from how deep in the stack the exception was thrown.