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Exception Handling
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1. Python for ethical hackers Mohammad reza Kamalifard kamalifard@datasec.ir
2. Python language essentials Module 1: Introduction to Python and Setting up an Environment for Programing Part 7 : Exception Handling
3. Exceptions Simply put exceptions are error condtions which disrupt the normal flow of the program Python allows for a simple and elegant way to handle exceptions >>> 0/0 Traceback (most recent call last): File "<stdin>", line 1, in <module> ZeroDivisionError: integer division or modulo by zero Python Standard Exceptions http://www.tutorialspoint.com/python/standard_exceptions.htm
4. Exception Handling >>> try: ... print 0/0 ... except: ... print 'Exception Happened' ... Exception Happened >>> >>> try: ... print 100/10 ... except: ... print 'Exception' ... 10 >>>
5. else and finally >>> try: ... print 10/2 ... except: ... print 'Exception' ... else: ... print 'No Exception' ... finally: ... print 'Cleanup code always here' ... 5 No Exception Cleanup code always here >>>
6. else and finally >>> try: ... print 10/0 ... except: ... print 'Exception' ... else: ... print 'No Exception' ... finally: ... print 'Cleanup code always here' ... Exception Cleanup code always here >>>
7. >>> try: ... 10/0 ... except ZeroDivisionError: ... print 'Divided by Zero' ... Divided by Zero >>>
8. >>> try: ... 10/0 ... except Exception as err: ... print err ... integer division or modulo by zero >>> try: ... print name ... except Exception as err: ... print err ... name 'name' is not defined >>>
9. References SPSE securitytube training by Vivek Ramachandran SANS Python for Pentesters (SEC573) Violent python Security Power Tools python-course.eu ----------------------------- http://www.python-course.eu/exception_handling.php http://www.tutorialspoint.com/python/python_exceptions.htm http://www.wilfred.me.uk/blog/2013/11/03/no-naked-excepts/
10. This work is licensed under the Creative Commons Attribution-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nd/3.0/ Copyright 2013 Mohammad Reza Kamalifard All rights reserved. Go to Kamalifard.ir/pysec101 to Download Slides and Course martials .