Python中的split()应用

从网站返回的一个XML文件中截取某个字符串

源码如下：

#!/usr/bin/python

'''
此例对一个XML文件（str类型）进行分割取值，'list'类型不能进行split操作；取值超过1个时，即变成list类型。
weather.split('</item>')[1]先用“”分割，取得第二个元素。split('<description>')[1]
再用'<description>'分割这个元素，取得分割后的第二个元素，依次类推
strip()：去掉空格
strip('\n'):去掉换行符
replace('    ', ''):替换掉多余空格
'''

import urllib2
weather = urllib2.urlopen('').read()

next_weather1 = weather.split('')[1]
next_weather2 = weather.split('')[1].split('')[1]
next_weather2_1 = weather.split('')[1].split('')[0:1]
next_weather3 = weather.split('')[1].split('')[1].strip('\n')
next_weather4 = weather.split('')[1].split('')[1].strip('\n').split('\n')[1]
next_weather5 = weather.split('')[1].split('')[1].strip('\n').split('\n')[1].split(',')[0]
next_weather6 = weather.split('')[1].split('')[1].strip('\n').split('\n')[1].split(',')[0].replace('    ', '')
next_weather7 = weather.split('')[1].split('')[1].strip('\n').split('\n')[1].split(',')[0].strip()

print type(weather)
print weather
print ('---------------------------')
print next_weather1
print ('---------------------------')
print next_weather2
print ('---------------------------')
#print next_weather2_1
#print type(next_weather2_1)
#print ('---------------------------')
print next_weather3
print ('---------------------------')
print next_weather4
print ('---------------------------')
print next_weather5
print ('---------------------------')
print next_weather6
print ('---------------------------')
print next_weather7

运行结果

>>> ================================ RESTART ================================
>>>





    The Weather Network - Charlottetown, Prince Edward Island

    http://www.theweathernetwork.com/index.php?product=weather&placecode=cape0005&ref=current_obs

    The Weather Network - Canada's number one source for weather information in both the cable and web spaces.

Copyright The Weather Network. Use of this RSS feed is subject to the Terms of Use as defined at

    en-us



http://www.theweathernetwork.com/common/images/rss/rss_logo_en.jpg

The Weather Network

http://www.theweathernetwork.com/index.php?product=weather&placecode=cape0005&ref=current_obs



http://blogs.law.harvard.edu/tech/rss





      Current Weather

 http://www.theweathernetwork.com/index.php?product=weather&placecode=cape0005&ref=current_obs

 http://www.theweathernetwork.com/index.php?product=weather&placecode=cape0005&ref=current_obs

      Fri, 30 Dec 2011, 08:00:00 AST





spacer

http://www.theweathernetwork.com/index.php?product=weather&placecode=cape0005&ref=current_obs



      Clear,



-10 °C		, Humidity		79%		, Wind

calm











      Sunday, January 1, 2012





 Fri, 30 December, 2011, 06:46:00 AST



Light rain,

High  3 °C, Low  0 °C, P.O.P.  90%









      Monday, January 2, 2012





 Fri, 30 December, 2011, 06:46:00 AST



Cloudy with showers,

High 7 °C, Low 0 °C, P.O.P. 70%









      Tuesday, January 3, 2012





 Fri, 30 December, 2011, 06:46:00 AST



Variable cloudiness,

High -2 °C, Low -8 °C, P.O.P. 20%










---------------------------








      Sunday, January 1, 2012





 Fri, 30 December, 2011, 06:46:00 AST



Light rain,

High  3 °C, Low  0 °C, P.O.P.  90%




---------------------------


Light rain,

High  3 °C, Low  0 °C, P.O.P.  90%




---------------------------


Light rain,

High  3 °C, Low  0 °C, P.O.P.  90%




---------------------------
Light rain,

---------------------------
Light rain
---------------------------
Light rain
---------------------------
Light rain
>>>