This is a small introduction for new joinees in Kuliza about debugging. It include debugging using python for backend and frontend debugging(DOM, Network, Javascript) using the developer tools provided my Google. Please do checkout the links at last. they are very helpful for future references.

1. Debugging

2. Developer at Kuliza.
You can find me at:
@mascot6699
umang.shukla@kuliza.com
Hello!
I am Umang

3. Debugging
Debugging is the process of finding and resolving bugs or defects that
prevent correct operation of computer software or a system.
DEBUGGING ?

4. If you don’t debug
you are a code genius
OR
you don’t know how!

5. Agenda
Python
DOM
Javascript
Network

6. Python Debugging

7. PyCharm

8. Python debugger (ipdb or pdb)
Install ipython and ipdb for all projects
import ipdb; ipdb.set_trace()
print locals(), args
continue, step over

9. Logging (smarter prints)
1. import logging
2.
3. # create logger with 'error_log'
4. logger = logging.getLogger('error_log')
5. logger.setLevel(logging.DEBUG)
6.
7. # logging things in logger
8. logger.info('this is info')
9. logger.errors('this is error')
10. logger.warning('this is warning')
11. logger.debug('this is debug')

10. DOM Debugging

11. Let’s review some concepts

12. DOM Debugging
Rearrange/add/delete nodes
Edit attributes
Edit css
See the event listeners

13. Javascript
Debugging

14. Javascript Debugging

15. Javascript Debugging
Set debug points
Use console
Set watch expressions
Continue, Step over, Step Into, Step Out
See stack trace to find calling function

16. Network
Debugging

17. Network Debugging
Watch requests
Read headers and response
Learn cURL and postman!

18. Other resources
● https://developer.chrome.com/devtools/docs/remote-debugging
● https://developer.chrome.com/devtools/docs/tips-and-tricks
● http://getfirebug.com/firebuglite
● http://stackoverflow.com/questions/5967241/how-to-execute-
multi-line-statements-within-pythons-own-debugger-pdb
● http://frid.github.io/blog/2014/06/05/python-ipdb-cheatsheet/
● http://www.slideshare.net/noelled/debugging-python-pdb-ndaley-
50574986

19. Any Questions

20. Credits
Special thanks to all the people who made and released
these awesome resources for free:
■ Presentation template by SlidesCarnival
■ Photographs by Unsplash