Python Introduction
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This document provides an introduction to the Python programming language, covering its background, features, syntax, types, operators, control flow, functions, classes, tools, and examples. Python is a multi-purpose, object-oriented language that is interpreted, dynamically typed, and focuses on readability and productivity. It has a large standard library and is used by many companies like Google, YouTube, and Spotify.
Python Introduction
- 1. Introduction to Python A readable, dynamic, pleasant, flexible, fast and powerful language
- 2. Overview • Background • Syntax • Types / Operators / Control Flow • Functions • Classes • Tools
- 3. What is Python • Multi-purpose (Web, GUI, Scripting, etc.) • Object Oriented • Interpreted • Strongly typed and Dynamically typed • Focus on readability and productivity
- 4. Features • Batteries Included • Everything is an Object • Interactive Shell • Strong Introspection • Cross Platform • CPython, Jython, IronPython, PyPy
- 5. Who Uses Python • Google • Youtube • Spotify • Nasa • Etc
- 6. Releases • Created in 1989 by GuidoVan Rossum • Python 1.0 released in 1994 • Python 2.0 released in 2000 • Python 3.0 released in 2008 • Python 2.7 is the recommended version • 3.0 adoption will take a few years
- 7. Syntax
- 9. Indentation • Most languages don’t care about indentation • Most humans do • We tend to group similar things together
- 10. Indentation The else here actually belongs to the 2nd if statement
- 11. Indentation The else here actually belongs to the 2nd if statement
- 12. Indentation I knew a coder like this
- 13. Indentation You should always be explicit
- 15. Comments
- 16. Types
- 17. Strings
- 18. Numbers
- 19. Null
- 20. Lists
- 21. Lists
- 22. Tuple • Tuple just like List • But immutable • Assignment using ( )
- 23. Dictionaries
- 25. Booleans
- 26. Operators
- 27. Arithmetic
- 32. Control Flow
- 33. Conditionals
- 34. For Loop
- 36. While Loop
- 37. List Comprehensions • Useful for replacing simple for-loops.
- 38. Functions
- 39. Basic Function
- 42. Fibonacci
- 44. Classes
- 46. Class Attributes • Attributes assigned at class declaration should always be immutable
- 47. Class Methods
- 48. Class Instantiation & Attribute Access
- 50. Python’s Way • No interfaces • No real private attributes/functions • Private attributes start (but do not end) with double underscores. • Special class methods start and end with double underscores. • __init__, __doc__, __cmp__, __str__
- 51. Imports • Allows code isolation and re-use • Adds references to variables/classes/functions/etc. into current namespace
- 52. Imports
- 53. More Imports
- 54. Error Handling
- 55. Documentation
- 56. Docstrings
- 57. Tools
- 58. Web Frameworks • Django • Flask • Pylons • TurboGears • Zope • Grok
- 59. IDEs • Emacs • Vim • Komodo • PyCharm • Eclipse (PyDev)
- 61. Resources • http://python.org/ • http://diveintopython.org/ • http://djangoproject.com/
- 62. Example
- 63. Going Further • Decorators • Context Managers • Lambda functions • Generators • ...
- 64. Questions?
- 65. Thanks!