Python Novice to Ninja
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This document outlines an agenda for a Python tutorial session, beginning with an introduction to Python's motivation and essentials like data types, operators, and flow control. It then provides examples of expressions, variables, and basic data structures like lists, tuples, and dictionaries. The session demonstrates Python blocks like conditionals, loops, functions, classes and modules. It concludes by suggesting areas for further practice like system administration, web development, and games.
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Python Novice to Ninja
- 2. PYTHON FROM NOVICE TO NINJA. A CONVERT SESSION BY @ALSAYEDGAMAL
- 3. WARNING: BEGINNERS ONLY SESSION • Works also as a quick start guide for other language developers. • No offence Java guys :)
- 4. AGENDA • Motivation. • Python essentials. • Some basic examples. • What to hack ?
- 7. CROSS PLATFORM WRITE ONCE, RUN EVERYWHERE.
- 8. SYSTEM.OUT.PRINT(“HELLO,WORLD”); IT TAKES 1 LINE TO YOUR “HELLO, WORLD” EASY TO LEARN IT TAKES > 10 SECONDS TO WRITE YOUR HELLO, WORLD.
- 9. FROM 29TH TO 7TH IN < 8 YEARS* IT’S 8TH SINCE 2012 *TOIBE.COM | TIOBE PROGRAMMING COMMUNITY INDEX FOR NOVEMBER 2014
- 10. PYTHON ESSENTIALS • Scripting nature. • Basic data types. • Operators. • Flow control. • Functions are fun. • Modules. • OOP.
- 11. EXPRESSION IN PYTHON. OPERATORS variable = 3 + 2 #EXPRESSION OPERANDS + * = / % [] () > = & != | Variables x,name, __len__ Data 5, “hello”, [1,2,3]
- 12. TYPES IN PYTHON #ASSIGNMENT ! #CHECK FOO’S TYPE ! #ANOTHER ASSIGNMENT ! #FOO’S TYPE CHANGED variable = 10 type(variable) variable = “ten” type(variable) Dynamic Implicit x = 10 + “10” #ERROR
- 13. TYPES IN PYTHON Strings line = “Hello” multi = “”” I use this to write multiline strings like html tags””” raw = r’I’ll not replace n or t’ #used in regex print(line[0]) #will print H try -3 template = "%d developers founded %s” % (3, ‘GDG Mansoura’) #3 developers founded GDG Mansoura ‘{0}, {1}, {2}’.format(‘A’, ‘B’, ‘C’) #A, B, C unicode_str = u’A unicode u018e string xf1'
- 14. TYPES IN PYTHON Boolean 1. It’s True not true 2. It’s False not false
- 15. TYPES IN PYTHON Data structures List names = [‘Ahmed’, ‘Sayed’, ‘AbdulHameed’] first_name = names[0] names[1] = “AlSayed” #names = [‘Ahmed’, ‘AlSayed’, ‘AbdulHameed’] Tuple family = (“AlSayed”, ”Reem”) family[1] = “Some one else” TypeError: 'tuple' object does not support item assignment x = 5 y = 6 x, y = y, x
- 16. TYPES IN PYTHON Data structures Dictionary phonebook = {‘name’:”Ahmed Gamal”, ‘age’ : 28, ‘telephone’: ‘0123456789’,‘email’: ‘ahmed@example.com’} Traversing Dictionary for key in phonebook.keys(): print key for val in phonebook.values(): print val
- 17. PYTHON BLOCKS if condition: If block elif condition: else If block else: else block Branching Where is a fixed indentation spaces or tabs
- 18. PYTHON BLOCKS for item in xrange(10): for block else: @ normal end Loop while true: loop on this else: @ normal end Normal end means no break For is used basically for traversing iterable types (lists for example) xrange is generating an iterable object
- 19. PYTHON BLOCKS Loop found_obj = None for obj in objects: if obj.key == search_key: found_obj = obj break else: print (‘No object found.’)
- 20. PYTHON BLOCKS class Car(Vehicle): #constructor def __init__(self, arg1): pass Class Definition
- 21. PYTHON BLOCKS def foo(x,y): function body Functions def foo(x,y=‘default’): function body def foo(x,y=‘default’): function body def foo(x,y): return exprsn def foo(x,y=‘default’): function body def foo(x,y=‘default’): function body
- 22. GETTING YOUR HANDS DIRTY TIME TO EXPLAIN IN CODE.
- 23. BEFORE WE START • If you are linux or unix based you are good to go. • Else If you are on windows (I hope not) download and install • sublime text editor • python runtime • Our code will be perfect for Python 2.x and may be 3.x.
- 24. SORTED?
- 25. MEDIA.PY P1: Tawfik Okasha P2: Amr Adib
- 26. SCRIPT HIGHLIGHTS. • Basic expression (variable assignment). • User input and output. • Function definition / passing function as variable. • List data-type. • Basic sorting.
- 27. MODULES AND PACKAGES • from foo import bar • from foor import * # please, don’t use it often • Packages are directory with __init__.py file • import this #Zen of python
- 28. NEXT: SHAPING YOUR EXPERIENCE SYSTEM ADMIN, WEB, DESKTOP, NETWORK, GAME DEVELOPMENT,…
- 30. QUESTIONS?
- 31. THANKS
- 32. RESOURCES • Google Education (Python Class)| https://developers.google.com/edu/python/ • Python Docs | https://docs.python.org • www.tiobe.com/index.php/content/paperinfo/ tpci/index.html