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'python中enumerate函数用法实例分析'

NULL

'python, enumerate函数'

'本文实例讲述了python中enumerate函数用法。分享给大家供大家参考。具体分析如下：
今日发现一个新函数 enumerate 。一般情况下对一个列表或数组既要遍历索引又要遍历元素时，会这样写： for i in range (0,len(list)): print i ,list[i] 但是这种方法有些累赘，使用内置enum'

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'2023-07-31 02:19:39'

'2023-07-31 02:19:39'

'0'

'<p>本文实例讲述了python中enumerate函数用法。分享给大家供大家参考。具体分析如下：</p>
<p>今日发现一个新函数 enumerate 。一般情况下对一个列表或数组既要遍历索引又要遍历元素时，会这样写：</p>
<pre class="brush:py;">
for i in range (0,len(list)): 
  print i ,list[i]
</pre>
<p>但是这种方法有些累赘，使用内置enumerrate函数会有更加直接，优美的做法，先看看enumerate的定义：</p>
<pre class="brush:py;">
def enumerate(collection): 
  \\\'Generates an indexed series: (0,coll[0]), (1,coll[1]) ...\\\'   
   i = 0 
   it = iter(collection) 
   while 1: 
   yield (i, it.next()) 
   i += 1

</pre>
<p>enumerate会将数组或列表组成一个索引序列。使我们再获取索引和索引内容的时候更加方便如下：</p>
<pre class="brush:py;">
for index，text in enumerate(list)): 
  print index ,text

</pre>
<p>在cookbook里介绍，如果你要计算文件的行数，可以这样写：</p>
<pre class="brush:py;">
count = len(open(thefilepath,\\\'rU\\\').readlines())</pre>
<p>前面这种方法简单，但是可能比较慢，当文件比较大时甚至不能工作，下面这种循环读取的方法更合适些。</p>
<pre class="brush:py;">
Count = -1 
For count,line in enumerate(open(thefilepath,\\\'rU\\\'))： 
  Pass
Count += 1

</pre>
<p>希望本文所述对大家的python程序设计有所帮助。</p>'

'1690741179'

'1690741179'

'python, enumerate函数'

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  'description' => 'title()方法返回所有单词的第一个字符大写的字符串的一个副本。
语法
以下是title()方法的语法： str.title(); 参数  NA 返回值
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一、问题：
你觉得网络上像msn，qq之类的工具在多台机器之间互相传输数据神秘吗？你也想玩一下在两台机器之间传数据吗？今天让python告诉我们基本原理吧，当然只是做简单的了解，实',
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'python中enumerate函数用法实例分析_程序人生_晓说杂谈'

'python, enumerate函数'

'本文实例讲述了python中enumerate函数用法。分享给大家供大家参考。具体分析如下：今日发现一个新函数 enumerate 。一般情况下对一个列表或数组既要遍历索引又要遍历元素时，会这样写： for i in range (0,len(list)): print i ,list[i] 但是这种方法有些累赘，使用内置enum'

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      array (
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        'show' => 'show.html',
        'category' => 'category.html',
        'search' => 'search.html',
        'pagesize' => 20,
        'mpagesize' => 20,
      ),
      'seo' => 
      array (
        'list_title' => '[第{page}页{join}]{name}{join}{SITE_NAME}',
        'show_title' => '[第{page}页{join}]{title}{join}{catname}{join}{SITE_NAME}',
      ),
      'getchild' => 0,
      'urlrule' => 1,
      'html' => 0,
      'chtml' => 0,
    ),
    'displayorder' => '0',
    'is_ctable' => '0',
    'pcatpost' => 0,
    'topid' => '9',
    'catids' => 
    array (
      0 => '9',
    ),
    'is_post' => 1,
    'url' => 'https://www.wxx86.cn/zhishi',
    'total' => '请使用count标签查询',
    'field' => 
    array (
    ),
  ),
  10 => 
  array (
    'id' => '10',
    'tid' => '1',
    'pid' => '0',
    'mid' => 'article',
    'pids' => '0',
    'name' => '每日语录',
    'dirname' => 'yulu',
    'pdirname' => '',
    'child' => 0,
    'disabled' => '0',
    'ismain' => 1,
    'childids' => 10,
    'thumb' => '',
    'show' => '1',
    'content' => '',
    'setting' => 
    array (
      'edit' => 1,
      'disabled' => 0,
      'template' => 
      array (
        'list' => 'list.html',
        'show' => 'show.html',
        'category' => 'category.html',
        'search' => 'search.html',
        'pagesize' => 20,
        'mpagesize' => 20,
      ),
      'seo' => 
      array (
        'list_title' => '[第{page}页{join}]{name}{join}{SITE_NAME}',
        'show_title' => '[第{page}页{join}]{title}{join}{catname}{join}{SITE_NAME}',
      ),
      'getchild' => 0,
      'urlrule' => 1,
      'html' => 0,
      'chtml' => 0,
    ),
    'displayorder' => '0',
    'is_ctable' => '0',
    'pcatpost' => 0,
    'topid' => '10',
    'catids' => 
    array (
      0 => '10',
    ),
    'is_post' => 1,
    'url' => 'https://www.wxx86.cn/yulu',
    'total' => '请使用count标签查询',
    'field' => 
    array (
    ),
  ),
)

'/program/43315-[page].html'

''

'https://www.wxx86.cn/program/43315.html'

array (
  'c' => 'show',
  'id' => '43315',
  'm' => 'index',
)