Question

I’m catching exceptions in context managers, however I don’t see all levels of reraised exceptions. Anyone knows how to improve this?

import traceback

def f():
    try:
        raise Exception("Interesting")
    except Exception as e:
        raise Exception("Exc {} raised".format(e))

class Try():
    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        print("Exception {} raised".format(exc_val))
        print("".join(traceback.format_tb(exc_tb, 100)))
        return True

with Try():
    f()

Here I’d like to also see the code line of the “Interesting” exception (line 5) in the traceback, however I get

Exception Exc Interesting raised raised
File "try_test.py", line 19, in <module>
    f()
File "try_test.py", line 7, in f
    raise Exception("Exc {} raised".format(e))

Answer 1

Use traceback.format_exception instead of traceback.format_tb.

See the traceback documentation.