Introduction to Python
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This document provides an introduction and overview of the Python programming language. It covers Python's history and key features such as being object-oriented, dynamically typed, batteries included, and focusing on readability. It also discusses Python's syntax, types, operators, control flow, functions, classes, imports, error handling, documentation tools, and popular frameworks/IDEs. The document is intended to give readers a high-level understanding of Python.
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Introduction to Python
- 1. Introduction to Python A readable, dynamic, pleasant, flexible, fast and powerful language Nowell Strite Manager of Tech Solutions @ PBS [email_address]
- 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 PBS NASA Library of Congress the ONION ...the list goes on...
- 6. Releases 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 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
- 14. Indentation Text Python embraces indentation
- 15. Comments
- 16. Types
- 17. Strings
- 18. Numbers
- 19. Null
- 20. Lists
- 21. Lists
- 22. Dictionaries
- 24. Booleans
- 25. Operators
- 26. Arithmetic
- 31. Control Flow
- 32. Conditionals
- 33. For Loop
- 35. While Loop
- 36. List Comprehensions Useful for replacing simple for-loops.
- 37. Functions
- 38. Basic Function
- 41. Fibonacci
- 43. Classes
- 45. Class Attributes Attributes assigned at class declaration should always be immutable
- 46. Class Methods
- 47. Class Instantiation & Attribute Access
- 49. 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__
- 50. Imports Allows code isolation and re-use Adds references to variables/classes/functions/etc. into current namespace
- 51. Imports
- 52. More Imports
- 53. Error Handling
- 54. Documentation
- 55. Docstrings
- 56. Tools
- 57. Web Frameworks Django Flask Pylons TurboGears Zope Grok
- 58. IDEs Emacs Vim Komodo PyCharm Eclipse (PyDev)
- 60. Resources http://python.org / http://diveintopython.org / http://djangoproject.com /
- 61. Example
- 62. Going Further Decorators Context Managers Lambda functions Generators ...
- 63. Questions?
- 64. Thanks!