10min python: settrace

10min python:

what is settrace?

settrace traces each execution instruction of python script

Where we can use it?

If you want to trace the execution sequence and it’s control over your entire script, this should be the right utility.It does similar to Django’s middleware property

How to use it?

import sys

def callback(frame, event, arg):
    do your magic using frame, event, arg

#your script starts from here


import sys

def mycallback(frame, event, arg):
    print "event is %s" %event
    print "args are %s" %arg
    print "current exe line funcname: %s" %frame.f_code.co_name
    print "current execution line: %s" %frame.f_lineno
    print "caller line no: %s" %frame.f_back.f_lineno
    print "caller file name: %s" %frame.f_back.f_code.co_name
    return callback function is important to trace the sequence of all instraction from entry to exit, if return is `None` only one instruction will be traced
    return mycallback 

def function(arg1, arg2):
    print "Input: ",arg1, arg2
    return arg1 + arg2

print function(4,5)


settrace in pythonkudos links:


bye bye!


About Navaneethan

mixed feelings...
This entry was posted in 10min, Academic, Python and tagged , . Bookmark the permalink.

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