功能：給文本添加HTML標記，使得到的文檔能夠在瀏覽器中顯示并能作為一個網頁使用。

要求：

輸入不應包含人工代碼或標簽；

應能處理不同的塊，比如標題、段落、列表項、內嵌文本(比如被強調的文本、URL等)；

具有可拓展性。

涉及到的知識點：(參見《Python基礎教程 第2版》)

要對文件進行讀寫(11章)，或者至少從標準輸入(sys.stdin)讀取，用print輸出

需要對所有輸入的行進行迭代(11章)

需要一些字符串方法(3章)

需要一個或兩個生成器(9章)

可能還需要re模塊(10章)

測試文檔：【text_input.txt】

Welcome to World Wide Spam, Inc.

These are the corporate web pages of World Wide Spam, Inc. We hope

you find your stay enjoyable, and that you will sample many of our

products.

A short history of the company

World Wide Spam was started in the summer of 2000. The business

concept was to ride the dot-com wave and to make money both through

bulk email and by selling canned meat online.

After receiving several complaints from customers who weren’t

satisfied by their bulk email, World Wide Spam altered their profile,

and focused 100% on canned goods. Today, they rank as the world’s

13,892nd online supplier of SPAM.

Destinations

From this page you may visit several of our interesting web pages:

How to get in touch with us

You can get in touch with us in many ways: By phone (555-1234), by

email (wwspam@wwspam.fu) or by visiting our customer feedback page

(http://wwspam.fu/feedback).

文本塊生成器：【url.py】

def lines(file):

for line in file:yield line

yield '\n'

def blocks(file):

block=[]

for line in lines(file):

if line.strip():

block.append(line)

elif block:

yield ''.join(block).strip()

block=[]

標記程序：【simple_markup.py】

import sys

import re

from util import *

print '

...'

title=True

for block in blocks(sys.stdin):

block=re.sub(r'\*(.+?)\*',r'\1',block)

if title:

print '

'

print block

print ''

else:

print '

'

print block

print '

'

print ''

執行：

python simple_markup.py text_output.html

輸出：【text_output.html】

...

Welcome to World Wide Spam, Inc.

These are the corporate web pages of World Wide Spam, Inc. We hope

you find your stay enjoyable, and that you will sample many of our

products.

A short history of the company

World Wide Spam was started in the summer of 2000. The business

concept was to ride the dot-com wave and to make money both through

bulk email and by selling canned meat online.

After receiving several complaints from customers who weren't

satisfied by their bulk email, World Wide Spam altered their profile,

and focused 100% on canned goods. Today, they rank as the world's

13,892nd online supplier of SPAM.

Destinations

From this page you may visit several of our interesting web pages:

- What is SPAM? (http://wwspam.fu/whatisspam)

- How do they make it? (http://wwspam.fu/howtomakeit)

- Why should I eat it? (http://wwspam.fu/whyeatit)

How to get in touch with us

You can get in touch with us in many ways: By phone (555-1234), by

email (wwspam@wwspam.fu) or by visiting our customer feedback page

(http://wwspam.fu/feedback).

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