Resuming a program's execution after correcting error

MonkeeSage MonkeeSage at
Thu Sep 28 20:49:00 CEST 2006

Georg Brandl wrote:
> As I said before, this can be done by finding out where the error is raised,
> what the cause is and by inserting an appropriate try-except-statement in
> the code.

I could be mistaken, but I *think* the OP is asking how to re-enter the
stack at the same point as the exception exited from and continue with
the execution as if the exception never happened. AFAIK, that isn't
possible; however, given that he has a file to work from that indicates
a portion of the state at the time of the exception, I think he may be
able simulate that kind of functionality by reading in the file on
exception and then returning a call to the function where the exception
occured with the data from the file. Something like this mockup:

def faulty_function(a, b, c=None):
  if not c:
    c = 0
    # modify c, write c to file...
    # oops hit an exception
    c += a / b
    # read from the file here
    # c = ...
    # and fix the error
    b += 1
    return faulty_function(a, b, c)
  return c

print faulty_function(2, 0) # => 2

Of course, it's probably much better to just fix the code and avoid the
exception in the first place. ;)


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