Python - A Comprehensive Programming Language, talk at 1. CSIE, Providence University, 2009/05/08 2. CSIE, National Taichung Institute of Technology, 2009/10/29

1. Python
A Comprehensive
Programming Language
胡崇偉
marr@citi.sinica.edu.tw
Open Source Software Foundry

2. 自由軟體鑄造場
• 營運網站以提供自由軟體專案進駐開發
• 提供系統技術與工具以協助軟體開發
• 研究開放源碼軟體授權條款與法律政策
議題並提供諮詢
• 媒合促成以自由軟體為基礎的本地成功
案例
• 報導國內外產業及社群新聞
• 進行人才培育及國際交流活動

3. Service and Resource
專案管理

4. Service and Resource
共同筆記
檔案下載 版本管理
專案管理
通信論壇 待辦事項
統計資訊

5. Service and Resource
資源目錄 共同筆記 人才資料
檔案下載 版本管理
授權條款
專案管理 電子報
精靈
通信論壇 待辦事項
研究報告
統計資訊 推廣光碟
教學文件

6. 軟體自由協會
• http://www.slat.org/
• 台灣推展軟體自由運動的社團法人
• 執行校園自由軟體應用諮詢中心計畫
• 協助社群代收贊助款項
• 舉辦研討會及推廣活動

7. Python ?

8. Python is a
Dynamic
Object-Oriented
Programming Language

9. Run-Time Typing
• Python's run time must work harder than Java's.
• a+b=?
– inspect the objects a and b to find out their type,
which is not known at compile time.
– 7 + 11.0
– ‘Hello’ + ‘world’
– (1, 2, 3) + (4, 5, 6)

10. >>> 是提示符號

11. Interactive with Interpreter
Edit
Debug Compile
Wait
Deploy Print Read
Eval
Read-Eval-Print Loop

12. Built-in DataTypes
• Number 7, 11.0
elements
elements
• String ‘Hello World’
• List [7, 11, ‘store’]
• Tuple (7, 11, ‘shop’)
• Dictionary {‘name’:’marr’, ‘home’:’taipei’}
keys

13. MIT to Try Python in CS Courses

14. Other Features
• Cross Platform and Porting
• Excellent Modules
• Small
• Efficient
• Popular

15. Nokia PyS60

16. Indexing and Slicing
0 1 2 7
[ ↓ ↓ ↓
-6
↓
-2 -1
↓ ↓
]
I L o v e P y t h o n
• myString = “I Love Python”
• myString[0] == “I”
• myString[-1] == “n”
• myString[7:-2] == “Pyth”

17. Code Indenting
• No explicit begin or end
• No curly braces
if age > 18:
print “You are old enough.”
else:
print “You are too young.”

18. Function Example
def myFunc(score):
“””
document strings
“””
import math
math.sqrt(score) * 10

19. File Handling
fileobj = open(“myfile”, “r”)
lines = fileobj.readlines()
for line in lines:
print line

20. Socket Creation
import socket
s = socket.socket(
socket.AF_INET,
socket.SOCK_STREAM)
s.connect(
("www.mysite.com", 80))

21. Twisted - Networking Engine
• A web server, numerous chat
clients, chat servers, mail servers
and more.
• Supported protocols: TCP, SSL,
multicast, HTTP, IMAP and more
• Sample apps: BitTorrent, CIA
Bot, BuildBot, apt-proxy2

22. RestructuredText
• http://docutils.sourceforge.net/
• Support Formats: HTML,XML,S5,LaTeX
• rst2html < myRST.txt > myRST.html

23. Version Control
• Mercurial

24. GUI Library and Toolkit

25. Wingware
IDE

26. Python Package Index

27. PyGame

28. PyGame

29. Blender

30. Elephants Dream

31. SQLAlchemy
from sqlalchemy import *
db =
create_engine(‘sqlite:///tutorial.db’)
metadata = MetaData(db)
users = Table(‘users’, metadata,
Column(‘user_id’, Integer,
primary_key=True),
Column(‘name’, String(40)),
)
users.create()
i = users.insert()
i.execute(name=‘marr’)

32. Web Frameworks

33. Python Hosting

34. Extending and Embedding
$ swig -python example.i
$ gcc -c example.c example_wrap.c
-I/usr/local/include/python2.1
$ ld -shared example.o example_wrap.o -o
_example.so
>>> import example
>>> example.fact(5)
120

35. Self Learning – Where to Start
• On-line Tutorial • Books
– Google ‘python tutorial’ – Better in English

36. Video Tutorials
• http://www.showmedo.com/
• http://www.youtube.com/
• http://video.google.com/
• http://www.blip.tv/

37. Local User Groups
• http://python.org.tw/
• http://planet.python.org.tw/
• Facebook: Python Taiwan
• Google Group: pythontw
• OpenFoundry Forums
• Hemidemi: python

38. Anytime, Anywhere
IPython
Google App Engine
http://shell.appspot.com/

39. Python-based CMS Case Study

40. Plone …
a CMS
Built on Zope
Written in Python

41. Blog (CoreBlog)

42. Portal (CIA, USA)

43. Portal (NASA, USA)

44. Network Management (ZenOSS)

45. Issue Tracker (Poi)

46. Download Installer
• http://plone.org/products/plone

47. Windows Installer

48. Windows Installer

49. Windows Installer

50. Plone Controller

51. Filesystem Listing
• Python
• Zope
• Plone
• Packages/Products
• Software Home
• Instance Home

52. One Database, Many Instances
HTTP Requests and Responses
port 8080 port 8081
ZEO Client #1 ZEO Client #2
Data.fs
Instance #1 Instance #2

53. Front Page

54. Zope Management Interface (ZMI)

55. Site Setup

56. Guest View

57. Authenticated View

58. -
Tip for Trying Out
Different Browsers
for
Different Users/Roles
One for Admin, Another for Regular User

59. Usecase #1
Create
a New User

61. Views Available After Login
• Personal Bar
• Content Views

62. Usecase #2
Create
New Contents
(Page)

63. Default Content Types
Page Image
News Item File
Event Link

64. Title to ID (Part of the URL)
↓

65. Visual Editor

66. Content States

67. Default State and Workflow

68. Roles and Permissions
View Add Edit Review
Manager ✔ ✔ ✔ ✔
Reviewer ✔ ✔ ✔
Member ✔ ✔ ✔
Non-Login ？

69. Core Security Mapping

70. Transaction and Undo

71. Usecase #3
Manage
Portlets

76. Usecase #4
Enable
OpenID Support

78. Usecase #5
Change Theme
(to NuPlone)

79. Free Themes

80. Better and Super Plone ?

81. Want More ?
Join the Community
and Develop !

82. Starting Points
• http://plone.org/documentation
• http://marrtw.blogspot.com/2009/04/plone3-books.html

83. SQL Database Connection
Z SQL Z SQL Z SQL Z SQL Z SQL Z SQL
Method Method Method Method Method Method
MySQL PgSQL ODBC
Database Database Database
Connection Connection Connection

84. Database Components
HTML WYSWYG Editor
Plone
DTML Page Template Site
Development
and
Search Interface Script Management
Z SQL Method
Database
Zope Connection
MySQLDA PsycopgDA ODBCDA Database
Gadfly Adapter
MySQL PostgreSQL MSSQL

85. Designer Friendly Templates
• Work with WYSIWYG editors
• Zope Page Template (ZPT)
– Template Attribute Language (TAL)
– Macro Expansion Tag Attribute Language (METAL)
XML Namespace
TAL statement
name body
Attribute Attribute Element
Name Value Content
<title tal:content="here/title">Page Title</title>

86. Theme Designers ?
• AJAX / jQuery Support
• KSS = Kinetic Style Sheets
• Deliverance
• Must Read
– Plone 3 Theming

87. Repeatable Development
editing running with
buildout.cfg bin/buildout
installed as
downloading checking into
product/
package *.egg Python
Package
*.tar.gz Index

88. Build Your Own Project
cd c:
C:plonepythonScriptspaster
create plone3_buildout
MyBuildout
cd MyBuildout
vim buildout.cfg
binbuildout.exe

89. buildout.cfg Sample
[buildout]
http-address = 8080
eggs =
Plone
my.package
zcml =
my.package
debug-mode = on

90. Summary
A Comprehensive CMS
通用型的內容管理系統
The Web CMS Report
Ideaware Report

91. Web CMS 2007
Technology Content Production Services
Standards Authoring & Transformation
Development Aggregation
Access Control Repository Services
Templating Metadata/Taxonomy Management
Page Rendering Globalization
Usability Promotion Path
Internationalization System Reporting
Content Delivery Services Vendor Intangibles
Personalization
Maintenance & Support
Site Search
Integration & Tech Partnerships
Scaling & Performance
Active User Groups
Multichannel & Syndication
Services & Channel
Content Retention
Product QA
User-Generated Content
Strategy & Roadmap
Micro-Applications
Good Value
Site Analytics

92. Active Community

93. Multilingual Support

94. Open Source Projects
ArgoUML
SchoolTool

95. Alternative Theming - Deliverance

96. Developer Baby Steps
• Python Script + External Method

97. Plone Hosting

98. Thank You !
Question?
Email to marr.tw@gmail.com