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Python中的split()应用 (2011-12-31 08:37)
标签:  hidden  分类： Python


从网站返回的一个XML文件中截取某个字符串
源码如下：
  1. #!/usr/bin/python

  3. '''
  4. 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。
  5. weather.split('</item>')[1]先用“</item>”分割，取得第二个元素。split('<description>')[1]
  6. 再用'<description>'分割这个元素，取得分割后的第二个元素，依次类推
  7. strip()：去掉空格
  8. strip('\n'):去掉换行符
  9. replace('    ', ''):替换掉多余空格
  10. '''

  12. import urllib2
  13. weather = urllib2.urlopen('http://rss.theweathernetwork.com/weather/cape0005').read()

  15. next_weather1 = weather.split('</item>')[1]
  16. next_weather2 = weather.split('</item>')[1].split('<description>')[1]
  17. next_weather2_1 = weather.split('</item>')[1].split('<description>')[0:1]
  18. next_weather3 = weather.split('</item>')[1].split('<description>')[1].strip('\n')
  19. next_weather4 = weather.split('</item>')[1].split('<description>')[1].strip('\n').split('\n')[1]
  20. next_weather5 = weather.split('</item>')[1].split('<description>')[1].strip('\n').split('\n')[1].split(',')[0]
  21. next_weather6 = weather.split('</item>')[1].split('<description>')[1].strip('\n').split('\n')[1].split(',')[0].replace('    ', '')
  22. next_weather7 = weather.split('</item>')[1].split('<description>')[1].strip('\n').split('\n')[1].split(',')[0].strip()

  24. print type(weather)
  25. print weather
  26. print ('---------------------------')
  27. print next_weather1
  28. print ('---------------------------')
  29. print next_weather2
  30. print ('---------------------------')
  31. #print next_weather2_1
  32. #print type(next_weather2_1)
  33. #print ('---------------------------')
  34. print next_weather3
  35. print ('---------------------------')
  36. print next_weather4
  37. print ('---------------------------')
  38. print next_weather5
  39. print ('---------------------------')
  40. print next_weather6
  41. print ('---------------------------')
  42. print next_weather7
运行结果
  2. >>> ================================ RESTART ================================
  3. >>> 
  4. <type 'str'>
  5. <?xml version="1.0" encoding="ISO-8859-1"?><rss version="2.0">

  7.   <channel>

  9.     <title>The Weather Network - Charlottetown, Prince Edward Island</title>

  11.     <link>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=current_obs</link>

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

  15. <copyright>Copyright The Weather Network. Use of this RSS feed is subject to the Terms of Use as defined at http://www.theweathernetwork.com/aboutus/copyright#rss</copyright>

  17.     <language>en-us</language>

  19. <image>

  21. <url>http://www.theweathernetwork.com/common/images/rss/rss_logo_en.jpg</url>

  23. <title>The Weather Network</title>

  25. <link>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=current_obs</link>

  27. </image>

  29. <docs>http://blogs.law.harvard.edu/tech/rss</docs>


  33.     <item>

  35.       <title>Current Weather</title>

  37.  <guid>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=current_obs</guid>

  39.  <link>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=current_obs</link>

  41.       <pubDate>Fri, 30 Dec 2011, 08:00:00 AST</pubDate>

  43.  <image>

  45. <url>http://rss.counter.weather.ca/counter.gif</url>

  47. <title>spacer</title>

  49. <link>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=current_obs</link>

  51. </image>

  53.       <description>Clear,

  55.  

  57. -10&amp;nbsp;&amp;deg;C , Humidity 79% , Wind 

  59. calm </description>


  63.     </item>




  69.     <item>

  71.       <title>Sunday, January 1, 2012</title>

  73.    <guid>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=day1#ltermfx</guid>

  75.    <link>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=day1#ltermfx</link>

  77.  <pubDate>Fri, 30 December, 2011, 06:46:00 AST</pubDate>

  79.       <description>

  81. Light rain,

  83. High  3&amp;nbsp;&amp;deg;C, Low  0&amp;nbsp;&amp;deg;C, P.O.P.  90%  

  85.  </description>

  87.     </item>



  91.    <item>

  93.       <title>Monday, January 2, 2012</title>

  95.    <link>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=day2#ltermfx</link>

  97. <guid>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=day2#ltermfx</guid>

  99.  <pubDate>Fri, 30 December, 2011, 06:46:00 AST</pubDate>

  101.        <description>

  103. Cloudy with showers,

  105. High 7&amp;nbsp;&amp;deg;C, Low 0&amp;nbsp;&amp;deg;C, P.O.P. 70%  

  107.  </description>

  109.     </item>



  113.      <item>

  115.       <title>Tuesday, January 3, 2012</title>

  117.    <link>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=day3#ltermfx</link>

  119. <guid>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=day3#ltermfx</guid>

  121.  <pubDate>Fri, 30 December, 2011, 06:46:00 AST</pubDate>

  123.       <description>

  125. Variable cloudiness,

  127. High -2&amp;nbsp;&amp;deg;C, Low -8&amp;nbsp;&amp;deg;C, P.O.P. 20%  

  129.  </description>

  131.     </item>

  133.       </channel>

  135. </rss>


  138. ---------------------------





  145.     <item>

  147.       <title>Sunday, January 1, 2012</title>

  149.    <guid>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=day1#ltermfx</guid>

  151.    <link>http://www.theweathernetwork.com/index.php?product=weather&amp;placecode=cape0005&amp;ref=day1#ltermfx</link>

  153.  <pubDate>Fri, 30 December, 2011, 06:46:00 AST</pubDate>

  155.       <description>

  157. Light rain,

  159. High  3&amp;nbsp;&amp;deg;C, Low  0&amp;nbsp;&amp;deg;C, P.O.P.  90%  

  161.  </description>

  163.     
  164. ---------------------------


  167. Light rain,

  169. High  3&amp;nbsp;&amp;deg;C, Low  0&amp;nbsp;&amp;deg;C, P.O.P.  90%  

  171.  </description>

  173.     
  174. ---------------------------


  177. Light rain,

  179. High  3&amp;nbsp;&amp;deg;C, Low  0&amp;nbsp;&amp;deg;C, P.O.P.  90%  

  181.  </description>

  183.     
  184. ---------------------------
  185. Light rain,

  187. ---------------------------
  188. Light rain
  189. ---------------------------
  190. Light rain
  191. ---------------------------
  192. Light rain
  193. >>> 


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