How much do you know about python traceback? Here we will dive deep into this concept.

What is a traceback?
This module provides a standard interface to extract, format and print stack traces of Python programs.

It acts a lot like a python interpreter when it print a stack trace. traceback module has many functions, we will review some of them here.

traceback.print_exc():
Print exception information and up to limit stack trace entries from the traceback tb to file. This is a shorthand for print_exception(sys.exc_type, sys.exc_value, sys.exc_traceback, limit, file).

traceback.format_exc():
This is like print_exc(limit) but returns a string instead of printing to a file.

A sample traceback usage derived from python documentation:

import sys, traceback

 def run_user_code(envdir):
     source = raw_input(">>> ")
     try:
         exec source in envdir
     except:
         print "Exception in user code:"
         print '-'*60
         traceback.print_exc(file=sys.stdout)
         print '-'*60

 envdir = {}
 while 1:
     run_user_code(envdir)

#python #traceback #exception #format_exc #print_exc