PYTHON: From programmer to tamer
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The document outlines key insights from Alessandro Pisa's experience with Python, emphasizing the importance of coding best practices, debugging techniques, and continuous learning through community resources. It discusses tools like PDB for debugging, various testing strategies, and emphasizes the significance of logging and proper exception handling. The presentation encourages developers to utilize Python's built-in functionalities and adopt an agile mindset for scalable applications.
![Use comprehensions
[ale@padme presentations]$python3
>>> [x for x in range(10)]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> (x for x in range(10))
<generator object <genexpr> at 0xb7187234>
>>> {x for x in range(10)}
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
>>> {x:x for x in range(10)}
{0: 0, 1: 1, 2: 2, 3: 3, 4: 4, ..., 9: 9}](https://image.slidesharecdn.com/ep2013-from-programmer-to-tamer-130703102223-phpapp01/85/PYTHON-From-programmer-to-tamer-45-320.jpg)
PYTHON: From programmer to tamer
- 1. PYTHON: From programmer to tamer Alessandro Pisa - 2013/07/03 - EuroPython 2013
- 3. HOW I MET PYTHON
- 4. It was nice to play football
- 7. c64
- 8. Something went wrong with Santa...
- 9. MSX2
- 10. Let the children play (otherwise bad things happen!)
- 11. Blue screen of Death... ...all the time!
- 12. Ready to become a Nerd
- 14. Let's GIVE Software another chance True story :(
- 16. Ready to gooooo!
- 17. OR NOT?
- 18. Question time
- 19. It's A HARD LIFE
- 20. Only the strongest will survive
- 21. RTFM!But...
- 22. Documentation is searchable and browsable http://www.python.org/doc/
- 23. Kaizen Daily homework http://planet.python.org/ http://twitter.com http://plus.google.com ... Don't be afraid of asking help Any pythonista around Mailing list IRC http://stackoverflow.com http://www.python.org/community You are here, and this is nice!
- 24. YOur friend PDB Get in touch with your gears
- 25. Debugging A nice writeup to start playing with PDB: http://pymotw.com/2/pdb/ Search for PDB in PyPI: https://pypi.python.org/pypi?% 3Aaction=search&term=pdb+debugger&submit=search Search debugging tools for your app on PyPI!
- 26. No more print
- 27. Logging Logging is an important part of your code!
- 28. Exceptions EXCEPTIONS ARE an important part of your code!
- 29. How good is your code? https://pypi.python.org/pypi/pep8 https://pypi.python.org/pypi/pyflakes https://pypi.python.org/pypi/PyChecker https://pypi.python.org/pypi/pylint
- 30. Use PYPI - The Cheeseshop https://pypi.python.org/pypi https://testpypi.python.org/pypi
- 32. Forget backup copies â bazaar (bzr) â git (git) â mercurial (hg) â subversion (svn)
- 33. You can choose your place No warranty about qualitY of life... â - http://bitbucket.org (git, hg) â - http://code.google.com (git, hg, svn) â - http://github.org (git, svn) â - http://launchpad.net (bzr)
- 34. Tickets!
- 35. A quite comprehensive list http://en.wikipedia.org/wiki/Comparison_of_issue-tracking_systems A ticket aggregator https://pypi.python.org/pypi/bugwarrior
- 36. Tests
- 37. Be agile!
- 38. Measure twice, cut once!
- 39. SCALABILITY Will your application handle... ... more data? ... more users? ... more REQUEST?
- 40. Fail fast!
- 41. The times I was bitten by Python!
- 43. Nerd wars â Use the Source, Luke â The Source will be with you, always â The Source is strong with this one â May the Source be with you https://pypi.python.org/pypi/jedi
- 44. Some random tips Use builtins! all, any, filter, map, sum, zip, ... http://docs.python.org/3/library/functions.html Code like a Pythonista! http://python.net/~goodger/projects/pycon/2007/idiomatic/handout.html Context managers! http://www.python.org/dev/peps/pep-0343/
- 45. Use comprehensions [ale@padme presentations]$python3 >>> [x for x in range(10)] [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] >>> (x for x in range(10)) <generator object <genexpr> at 0xb7187234> >>> {x for x in range(10)} {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} >>> {x:x for x in range(10)} {0: 0, 1: 1, 2: 2, 3: 3, 4: 4, ..., 9: 9}
- 46. Logging from logging import getLogger logger = getLogger('Test logger') def abs_ratio(x, y): try: return abs(x / y) except: logger.exception('Error abs_ratio: %r, %r' % (x, y)) return -1 abs_ratio(1, None) abs_ratio(1, 0)
- 47. Logging Error abs_ratio: 1, None Traceback (most recent call last): File "logexample.py", line 6, in abs_ratio return abs(x / y) TypeError: unsupported operand type(s) for /: 'int' and 'NoneType' Error abs_ratio: 1, 0 Traceback (most recent call last): File "logexample.py", line 6, in abs_ratio return abs(x / y) ZeroDivisionError: division by zero http://pymotw.com/2/logging/ http://pymotw.com/2/exceptions/