Introduction to python 3
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The document outlines a workshop titled 'Your First Scripting in Python 3.x' led by Youhei Sakurai, focusing on Python programming for beginners. It covers Python's features, setup instructions, practices, and goals, emphasizing its usability and importance in various industries. Attendees are encouraged to engage actively and complete a Kahoot quiz for reinforcement.
![pip and ipython
• pip … Package manager in Python
• Packages are on public repository similarly with apt, ppm, npm, etc
• ipython … Enhanced interactive shell
• [TAB] -> completion
• `?` -> help
• `??` -> see source
• `_` -> last output
• Auto indentation, [Ctrl]+c capturing, search ([Ctrl]+r), etc](https://image.slidesharecdn.com/introductiontopython3-160930064618/85/Introduction-to-python-3-19-320.jpg)
![Let’s install ipython using pip
1. Ensure connectivity to the Internet
2. Type `pip install ipython`
3. Hit [Enter]
…](https://image.slidesharecdn.com/introductiontopython3-160930064618/85/Introduction-to-python-3-20-320.jpg)
![“Hello world!”
1. Run `python` or `ipython`
2. Type `print(“Hello world!”)`
3. Hit [Enter]](https://image.slidesharecdn.com/introductiontopython3-160930064618/85/Introduction-to-python-3-22-320.jpg)
![Do basic practices – if … elif … else
1. Run `ipython`
2. Type code(s)
3. Hit [Enter]](https://image.slidesharecdn.com/introductiontopython3-160930064618/85/Introduction-to-python-3-25-320.jpg)
![Do basic practices – list, len(…)
1. Run `ipython`
2. Type code(s)
3. Hit [Enter]](https://image.slidesharecdn.com/introductiontopython3-160930064618/85/Introduction-to-python-3-26-320.jpg)
![Do basic practices – for … in …, range(…)
1. Run `ipython`
2. Type code(s)
3. Hit [Enter]](https://image.slidesharecdn.com/introductiontopython3-160930064618/85/Introduction-to-python-3-27-320.jpg)
![Do basic practices – while …, import
1. Run `ipython`
2. Type code(s)
3. Hit [Enter]](https://image.slidesharecdn.com/introductiontopython3-160930064618/85/Introduction-to-python-3-28-320.jpg)
![Do basic practices – open, “…”, b”…”
1. Run `ipython`
2. Type code(s)
3. Hit [Enter]](https://image.slidesharecdn.com/introductiontopython3-160930064618/85/Introduction-to-python-3-29-320.jpg)
![Do basic practices – open, “…”, b”…”
1. Run `ipython`
2. Type code(s)
3. Hit [Enter]](https://image.slidesharecdn.com/introductiontopython3-160930064618/85/Introduction-to-python-3-31-320.jpg)
![Do basic practices – urlopen
1. Run `ipython`
2. Type code(s)
3. Hit [Enter]](https://image.slidesharecdn.com/introductiontopython3-160930064618/85/Introduction-to-python-3-32-320.jpg)
Introduction to python 3
- 1. Introduction to Python 3 “Your first scripting in Python 3.x” workshop Youhei Sakurai, TC, CSS, YSJ APAC-EU time zone, 30th September, 2016
- 2. Youhei Sakurai • Intermediate Pythonista • Started to learn Python in 2010. • Have been introducing Python several times since 2011. • Publishing one package on PyPI – PyMemoryModule. • My name is written in change log of lxml 3.6.0.
- 3. Rules • Will finish on time even if some of topics are not completed. • Turn on your web-cam to enhance your active involvement. • Raise your questions to drive bi-directional communication. • If it is beyond beginner’s level, I’d suggest to have separate call. • If there’re too many, I’d select rather important ones for everyone. • Stay sharp with your text editor and Python installer.
- 4. Agenda • What’s Python • How Python looks like • Let’s set up Python • “Hello world!” • Do basic practices • Your first scripting • Study materials • Kahoot quiz
- 5. Goals • Make Python ready on your workstation. • Make yourself ready in the Python 3.x Ocean. • Get breadcrumb list to learn Python 3.x. • And... Let you get high score at Kahoot quiz.
- 6. What’s Python Make Python ready Make yourself ready Get breadcrumb list
- 7. What’s Python • One of programing languages like Java, C, Perl, Ruby, etc • No compilation, no type definitions, no magic, no callback hell • Well documented, cross platform, multi-purpose glue language • Used in Amazon, Google, Yahoo, Dropbox, NASA, etc OK, but why Python?
- 8. Why Python • Batteries included • Web server, database, GUI, networking, regex, XML, JSON, archiving, C/C++ integration, package manager, async I/O, serialization, etc. • Not a toy, powerful enough • Can write anything from one tiny script to large scaled enterprise application. • Defacto standard language in IT industry • Even I can write Python codes better than English email. Sounds like none of my business…
- 9. Why Python for you • Python runs anywhere • You can carry the most professional toolset everywhere • Python makes sense very well So, is Python perfect?
- 10. A few disadvantages in Python • Slower than C/C++ and assembly • No JIT (Just-In-Time) compiler equipped in CPython • GIL (Global Interpreter Lock) prevents real parallelism in CPython • Jython and IronPython falls much behind CPython Who cares?
- 11. So what’s Python… Python is the professional toolset never ever invented before!!
- 12. A bit more about Python History of Python • Created in 1989 by Guido Van Rossum • Python 1.0 released in 1994 • Python 2.0 released in 2000 • Python 3.0 released in 2008 • Python 2.7 released in 2010 • Python 3.5 released in 2015 • No Python 2.8 planned (*1) • EOL of Python 2.7 planed in 2020 (*2) *1 … PEP 404, *2 … PEP 373 Zen of Python (by Tim Peters) • Beautiful is better than ugly. • Explicit is better than implicit. • Simple is better than complex. • Complex is better than complicated. • Flat is better than nested. • Sparse is better than dense. • Readability counts. • Special cases aren't special enough to break the rules. …
- 13. What’s Python How Python looks like Make Python ready Make yourself ready Get breadcrumb list
- 14. How Python looks like Interactive shell - Windows • Just run `python` Interactive shell - Unix • Just run `python` or `python3` Version infoType any codes you want to run
- 15. How Python looks like Script 1. Create e.g. `script.py` file 2. Save it as UTF-8 text file Command line interface • Run `python script.py` No logo output by default
- 16. What’s Python How Python looks like Let’s set up Python Make Python ready Make yourself ready Get breadcrumb list
- 17. Let’s set up Python Windows / Mac OS X 1. Download installer 2. Double-click installer Windows -> Add Python to PATH Mac OS X -> Do NEVER fix system Python 3. Complete installation Linux (Debian/Ubuntu) 1. Retrieve packages list apt-get update 2. Install Python 3.x apt-get install python3 3. Install pip apt-get install python3-pip
- 18. Where’s standard location on Windows? `C:¥Python35` and `C:¥Python35-x64` are typical path IMHO
- 19. pip and ipython • pip … Package manager in Python • Packages are on public repository similarly with apt, ppm, npm, etc • ipython … Enhanced interactive shell • [TAB] -> completion • `?` -> help • `??` -> see source • `_` -> last output • Auto indentation, [Ctrl]+c capturing, search ([Ctrl]+r), etc
- 20. Let’s install ipython using pip 1. Ensure connectivity to the Internet 2. Type `pip install ipython` 3. Hit [Enter] …
- 21. What’s Python How Python looks like Let’s set up Python “Hello world!” ✓Make Python ready Make yourself ready Get breadcrumb list
- 22. “Hello world!” 1. Run `python` or `ipython` 2. Type `print(“Hello world!”)` 3. Hit [Enter]
- 23. How Python looks like Let’s set up Python “Hello world!” Do basic practices ✓Make Python ready Make yourself ready Get breadcrumb list
- 24. Differentiations from C style 1. `:` + indentation instead of `{ … }` 2. Pascal-like operators -> `and` `or` `not` 3. Bash-like comment -> starting with `#` 4. No difference between `’` and `”` 5. No need to put `;` at the end of line sample.py sample.c
- 25. Do basic practices – if … elif … else 1. Run `ipython` 2. Type code(s) 3. Hit [Enter]
- 26. Do basic practices – list, len(…) 1. Run `ipython` 2. Type code(s) 3. Hit [Enter]
- 27. Do basic practices – for … in …, range(…) 1. Run `ipython` 2. Type code(s) 3. Hit [Enter]
- 28. Do basic practices – while …, import 1. Run `ipython` 2. Type code(s) 3. Hit [Enter]
- 29. Do basic practices – open, “…”, b”…” 1. Run `ipython` 2. Type code(s) 3. Hit [Enter]
- 30. str object v.s. bytes object str – String "text" bytes – Binary data b"¥x74¥x65¥x78¥x74" (= b"text") "text".encode() b"text".decode()
- 31. Do basic practices – open, “…”, b”…” 1. Run `ipython` 2. Type code(s) 3. Hit [Enter]
- 32. Do basic practices – urlopen 1. Run `ipython` 2. Type code(s) 3. Hit [Enter]
- 33. Let’s set up Python “Hello world!” Do basic practices Your first scripting ✓Make Python ready ✓Make yourself ready Get breadcrumb list
- 34. Your first scripting • I am going to write dummy Web server. • My script will do: • Listen on 80/tcp. • Accept incoming connections. • Respond random number of words. • You are going to write HTTP client. • Your script will do: • Access server via HTTP. • Read content from response object. <- How to decode binary data? • Split content by white space. <- How to split string? • Print how many words in response. <- How to count list of strings?
- 35. “Hello world!” Do basic practices Your first scripting Study materials ✓Make Python ready ✓Make yourself ready Get breadcrumb list
- 36. Study materials • The Python Tutorial • Describes all you need to know about Python • Learn Python the Hard Way • Gives practical tasks to make you able to write Python codes • GitHub • Guides how you should write well-mannered Python codes
- 37. Congratulations!! ✓Make Python ready ✓Make yourself ready ✓Get breadcrumb list
- 38. Thank you for your participation. Open Kahoot! - https://kahoot.it