Capture and save the traceback from error

[M m]

I'm using my LoPys (lopy4) far away from my home, it means that if they have an error I can't go in a few days to see what's happening. Actually these days I'm having an error that I don't know what's happening.

My question is, can I save in a txt file the traceback info? This is very interesting because I will know the file and line where the error happened and I don't need to be in real time watching the console.

Actually I'm using the reset info, machine.reset_cause(), but is not enough.

I thought using try/except but with this I can capture the exception, but not the callback. Furthermore I'm not sure I'm doing correctly because I have a try/except at the start of each file and this can't be optimum. Like

# main.py
try:
    # All my "main.py" code.
except Exception as e:
    print(e) # Now I'm printing but I will write a txt file

# myClock.py
try:
    class Clock:

        def __init__(self):
            # Code

        def func1(self):
            # Code

except Exception as e:
    print(e)

You know how to do this like a pro?

Thank you very much!

[kjm]

@M-m I put mine in a function def logtraceback(e): which I call from any Exception as e: where I want to log the traceback.

[M m]

@kjm First of all, thank you very much for answering. I'm happy to see that I was in the correct way, but now my question is, where I have to put this code? In my main? In each function? In each class?

[kjm]

except Exception as e:
  sys.print_exception(e)                                                    # see the traceback
  from uio import StringIO; s=StringIO(); sys.print_exception(e, s)         # puts traceback into variable s, does not actually print
  s=s.getvalue(); s.replace('"',"").replace("'",'')                         # remove quotes that might confuse error logging via https

after this bit of massaging s is a sting you can save to a file. As provided to me by robert-hh (knowledgeable forum stalwart) a year or so ago when I was a python newbie.