formatException(exc_info)

`formatException(exc_info)` is a method in the `traceback` module of Python, which takes in a tuple of three values returned by `sys.exc_info()` (which contains information about the most recent exception that occurred) and returns a formatted string of the traceback information.

The formatted string includes the traceback information (the call stack) leading up to the exception, including the filename, line number, and function name where the exception occurred. This can be useful for debugging and understanding the cause of the exception.

Here's an example usage:

import traceback
import sys

try:
    # some code that may raise an exception
except Exception:
    exc_type, exc_value, exc_traceback = sys.exc_info()
    traceback_string = ''.join(traceback.format_exception(exc_type, exc_value, exc_traceback))
    print(traceback_string)

This will print out the traceback information for the most recent exception that occurred in the `try` block.