How to format traceback objects in Python

I have a traceback object that I want to show in the nice format I get when calling traceback.format_exc().

Is there a builtin function for this? Or a few lines of code?

format_exc() is really just

etype, value, tb = sys.exc_info()
return ''.join(format_exception(etype, value, tb, limit))

So if you have the exception type, value, and traceback ready, it should be easy. If you have just the exception, notice that format_exception() is essentially:

a_list = ['Traceback (most recent call last):\n']
a_list = a_list + format_tb(tb, limit)

where limit defaults to None.

Example:

To further aid in clarifying a (simple) application of format_exc():

import traceback

try:
    # Some code
except Exception:
    print('\nThe following error occurred:\n',
          traceback.format_exc(),
          'Processing aborted.\n',
          sep='\n')
    # sys.exit(1)