Is there a way to access variables after an error when running Python

Question

I am using Pycharm Community 4.5.4. I am running a program that takes a very long time to complete.

Unfortunately, I have a print statement that comes before the line that saves the data accumulated which has an error. I ran the print line by itself and confirmed that the line will fail.

It is possible that I made the change after I ran the program and so it won't fail but I can't be sure. The portion of code takes about 90 hours to complete and I have about 30 left if the execution time stays around the average.

So, if it fails, is there any way to recover the data?

Just to be clear, I am running and not debugging. Also, I am line profiling to see how each 2.5 hour iteration's time is spent.

Answer 1

So I told, you shoud update your main module to exit on the breakpoint

import pdb
import random
import time
import os
import traceback
import sys


def main(*args, **kw):
    for i in range(10):
        print("OK I'm in %d" % os.getpid())
        time.sleep(4)
        if i == 9:
            raise Exception

if __name__ == '__main__':
    try:
        main()
    except:
        type, value, tb = sys.exc_info()
        traceback.print_exc()
        pdb.post_mortem(tb)

Starting python debugger automatically on error Credit.

And use Pycharm attach to process. if an error is raised so you will be able to debug with pycharm.