Python get traceback from exception

Use traceback.format_exc() method to get traceback from exceptions in Python. the traceback Python library that provides a standard interface to extract, format, and print stack traces of Python programs (including those associated with an exception object – e.__traceback__).

traceback.format_exc()

It returns a string containing:

• A header that says Traceback (most recent call last):
• Stack traceback
• The exception type and value after the stack trace (eg: NameError: name 'some_var' is not defined)

Python gets traceback from exception

A simple example code gets the traceback:

import traceback


def func1():
    raise ValueError("Some error occurred!")


def func2():
    return func1()


def func3():
    try:
        func2()
    except Exception as e:
        # Return the traceback/stack trace as a string
        return traceback.format_exc()


print(func3())

Output:

You can use traceback.print_exc() to write to a file instead of returning a string:

except Exception as e:
        with open('print.txt', 'w+') as f:
            traceback.print_exc(file=f)

Extract traceback info from an exception object

It’s simple: exceptions come equipped with an __traceback__ attribute that contains the traceback. This attribute is also writable and can be conveniently set using the with_traceback method of exceptions:

raise Exception("foo occurred").with_traceback(tracebackobj)

Do comment if you have any doubts or suggestions on this Python exception-handling topic.

Note: IDE: PyCharm 2021.3.3 (Community Edition)

Windows 10

Python 3.10.1

All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.