Developing with pyGTK in EeePC

Developing with pyGTK in EeePC

胡崇偉marr@iis.sinica.edu.tw

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中央研究院 資訊科學研究所

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資源目錄

研究報告教學文件

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Easy Path to Linux Programming

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Easy Path to App Programming

• Especially for EeePC Linux Application Development, where requires the ability to quickly prototype and to glue software components.

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Benefits Using Python

• Easy to Implement

• Easy to Integrate

• Rich Libraries and Sample Codes

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Python Programming Overview

• Builtins

• Data Types

• Functions

• Classes/Objects

• Methods (Member Functions)

• Modules

• Packages

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Checking Basic Info

• python -V– Show Version Info

• dir()– Show Namespace Info

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Basic Data Types• myString = “Hello World”

• myList = [‘I’, ‘Love’, 7, 11]

• myTuple = (myList, ‘works’, 2)

• myDictionary = {“name”:”marr”,”location”:”taipei”}

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Indexing and Slicing

• myString = “I Love Python”

• myString[0] == “I”

• myString[-1] == “n”

• myString[7:-2] == “Pyth”

I L o v e P y t h o n

[0

↓

1

↓

2

↓

7

-6

↓

-2

↓

-1

↓]

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Builtin Function Example

range(3)[0, 1, 2]

for a in range(3): print “count down”, a

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Indenting Code

• No explicit begin or end

• No curly braces

• Use colon (:) and the indentation

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Python Style Guide

• http://www.python.org/doc/essays/styleguide.html

• Lay-out -- how to use tabs, spaces, and newlines.

• Comments -- on proper use of comments (and documentation strings).

• Names -- various naming conventions.

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Importing Modules

myString = “250”import mathmath.sqrt(myString)

TypeError: a float is required

from string import atoi

atoi(myString)250

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Function Example

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

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Libraries and Their Capabilities

• OS Operation– import os– import sys

• File Handling– open()

• Networking– Socket creating and handling– Twisted for high level applications

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import os

• os.chdir()

• os.getenv(“HOME”)

• os.listdir(os.getcwd())

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import sys

• sys.path

• sys.stdin

• sys.stdout

• sys.stderr

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File Handling

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

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Socket Connection for Client/Server

• Socket Creation

• Port Binding

• Raw Data I/O (sending and receiving)

• select() and pull() for Nonblocking sockets

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Socket Creation

import socket

s = socket.socket( socket.AF_INET, socket.SOCK_STREAM)s.connect( ("www.mysite.com", 80))

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Port Binding

import socket

serversocket = socket.socket( socket.AF_INET, socket.SOCK_STREAM)serversocket.bind( (socket.gethostname(), 80))serversocket.listen(5)

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FTP lib

from ftplib import FTPftp = FTP(“ftp.cdrom.com”)print ftp.login()ftp.retrlines('LIST‘)filename = “toPut.exe”file = open(filename, ‘wb’)

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FTP library example - miniFTP

• FTP Object and Dialog Initialization

• Login to Server and Logout from Server

• File List Generation• File Get/Put/Remove• Event Handling:

BUTTON_PRESS event, error exception

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gtkmozembed

• Get ready with these packages– xulrunner– libxul-dev– python-gnome2-extras

• http://www.pygtk.org/pygtkmozembed/class-gtkmozembed.html

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Gtkmozembed + flash

• Flash plug-in library placed in specific user folder

• $HOME/.mozilla/plugins

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Code Samples

• aspn.activestate.com/ASPN/Cookbook/Python• pyshop• Other Important Issues

– File Format Manipulation

– Exceptions

– Debugging and Testing

– GUI Libraries (Cairo)

– Unicode Howto

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THANK YOU