建立 Twistedquotes应用

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原文：http://www.klipdas.com/blog/?p=setting-up-twistedquotes-application

2.3 建立 TwistedQuotes应用

2.3.1 目标.

本文档介绍如何使用其他一些文档来建立TwistedQuotes应用，例如Twisted应用设计（24页）。

2.3.2 建立TwistedQuotes项目目录

为运行Twisted Quotes示例，你会需要做下面的工作：

在系统中创建TwistedQuotes目录；

将下面的文件放到TwistedQuotes目录下：

__init__.py

"""Twisted Quotes."""

quoters.py

from random import choice

from zope.interface import implements

from TwistedQuotes import quoteproto

class StaticQuoter:

"""

Return a static quote.

"""

implements(quoteproto.IQuoter)

def __init__(self, quote):

self.quote = quote

def getQuote(self):

return self.quote

class FortuneQuoter:

"""

Load quotes from a fortune-format file.

"""

implements(quoteproto.IQuoter)

def __init__(self, filenames):

self.filenames = filenames

def getQuote(self):

quoteFile = file(choice(self.filenames))

quotes = quoteFile.read().split('/n%/n')

quoteFile.close()

return choice(quotes)

quoteproto.py

from zope.interface import Interface

from twisted.internet.protocol import Factory, Protocol

class IQuoter(Interface):

"""

An object that returns quotes.

"""

def getQuote():

"""

Return a quote.

"""

class QOTD(Protocol):

def connectionMade(self):

self.transport.write(self.factory.quoter.getQuote()+'/r/n')

self.transport.loseConnection()

class QOTDFactory(Factory):

"""

A factory for the Quote of the Day protocol.

@type quoter: L{IQuoter} provider

@ivar quoter: An object which provides L{IQuoter} which will be used by

the L{QOTD} protocol to get quotes to emit.

"""

protocol = QOTD

def __init__(self, quoter):

self.quoter = quoter

plugins.tml

register("Quote of the Day TAP Builder",

"TwistedQuotes.quotetap",

description="""

Example of a TAP builder module.

""",

type="tap",

tapname="qotd")

将TwsitedQuotes目录的上一级目录添加到Python path，例如，如果TwistedQuotes目录是/tmp/TwistedQuotes，那么就将/tmp添加到Python path。在Unix下，可以使用export PYTHONPATH=/my/stuff:$PYTHONPATH，Winodws下，在系统变量PYTHONPATH前添加/my/stuff;。

在Python解释器中试着导入包：

Python 2.1.3 (#1, Apr 20 2002, 22:45:31)

[GCC 2.95.4 20011002 (Debian prerelease)] on linux2

Type "copyright", "credits" or "license" for more information.

>>> import TwistedQuotes

>>> # No traceback means you’re fine.