content |
'
<p>Python3是一种强大的编程语言,它拥有多种基本数据类型,包括数值、字符串、列表、元组、集合和字典。</p>
<h3>数值</h3>
<p>数值是Python中最基本的数据类型,它可以表示整数、浮点数、复数等。使用数值可以实现计算、比较等功能。例如:</p>
<pre>
a = 5
b = 3
c = a + b
print(c)
</pre>
<p>上面的代码将输出 8。</p>
<h3>字符串</h3>
<p>字符串是由字符组成的序列,它可以表示文本信息,例如:</p>
<pre>
str = "Hello World!"
print(str)
</pre>
<p>上面的代码将输出 Hello World!。字符串可以通过索引来访问字符,例如:</p>
<pre>
str = "Hello World!"
print(str[0])
</pre>
<p>上面的代码将输出 H。</p>
<h3>列表</h3>
<p>列表是Python中可变的序列,它可以存储任意类型的数据,例如:</p>
<pre>
list = [1, 2, 3, 4, 5]
print(list)
</pre>
<p>上面的代码将输出 [1, 2, 3, 4, 5]。列表可以通过索引来访问元素,例如:</p>
<pre>
list = [1, 2, 3, 4, 5]
print(list[0])
</pre>
<p>上面的代码将输出 1。</p>
<h3>元组</h3>
<p>元组是Python中不可变的序列,它可以存储任意类型的数据,例如:</p>
<pre>
tuple = (1, 2, 3, 4, 5)
print(tuple)
</pre>
<p>上面的代码将输出 (1, 2, 3, 4, 5)。元组可以通过索引来访问元素,例如:</p>
<pre>
tuple = (1, 2, 3, 4, 5)
print(tuple[0])
</pre>
<p>上面的代码将输出 1。</p>
<h3>集合</h3>
<p>集合是Python中无序的不重复的元素序列,它可以存储任意类型的数据,例如:</p>
<pre>
set = {1, 2, 3, 4, 5}
print(set)
</pre>
<p>上面的代码将输出 {1, 2, 3, 4, 5}。集合不能通过索引来访问元素,但可以使用in操作符来判断元素是否在集合中,例如:</p>
<pre>
set = {1, 2, 3, 4, 5}
print(3 in set)
</pre>
<p>上面的代码将输出 True。</p>
<h3>字典</h3>
<p>字典是Python中无序的键值对序列,它可以存储任意类型的数据,例如:</p>
<pre>
dict = {\'name\':\'Tom\',\'age\':20}
print(dict)
</pre>
<p>上面的代码将输出 {\'name\':\'Tom\',\'age\':20}。字典可以通过键来访问值,例如:</p>
<pre>
dict = {\'name\':\'Tom\',\'age\':20}
print(dict[\'name\'])
</pre>
<p>上面的代码将输出 Tom。</p>
<p>以上就是Python3中基本数据类型的介绍,它们的使用方法也很简单,只要掌握了基本的语法,就能够使用它们。</p>
' |
cat |
array (
'id' => '1',
'tid' => '1',
'pid' => '0',
'mid' => 'news',
'pids' => '0',
'name' => '知识百科',
'dirname' => 'zhishi',
'pdirname' => '',
'child' => 0,
'disabled' => '0',
'ismain' => 1,
'childids' => 1,
'thumb' => '',
'show' => '1',
'content' => '',
'setting' =>
array (
'disabled' => '0',
'linkurl' => '',
'getchild' => '0',
'notedit' => '0',
'urlrule' => 2,
'seo' =>
array (
'list_title' => '[第{page}页{join}]{catpname}{join}{SITE_NAME}',
'list_keywords' => '',
'list_description' => '',
),
'template' =>
array (
'pagesize' => '20',
'mpagesize' => '20',
'page' => 'page.html',
'list' => 'list.html',
'category' => 'category.html',
'search' => 'search.html',
'show' => 'show.html',
),
'cat_field' => NULL,
'module_field' => NULL,
'html' => 0,
'chtml' => 0,
),
'displayorder' => '0',
'icon' => '',
'index' => '',
'pcatpost' => 0,
'topid' => '1',
'catids' =>
array (
0 => '1',
),
'is_post' => 1,
'url' => 'http://www.wenhuiw.com/zhishi/',
'total' => '请使用count标签查询',
'field' =>
array (
),
) |
top |
array (
'id' => '1',
'tid' => '1',
'pid' => '0',
'mid' => 'news',
'pids' => '0',
'name' => '知识百科',
'dirname' => 'zhishi',
'pdirname' => '',
'child' => 0,
'disabled' => '0',
'ismain' => 1,
'childids' => 1,
'thumb' => '',
'show' => '1',
'content' => '',
'setting' =>
array (
'disabled' => '0',
'linkurl' => '',
'getchild' => '0',
'notedit' => '0',
'urlrule' => 2,
'seo' =>
array (
'list_title' => '[第{page}页{join}]{catpname}{join}{SITE_NAME}',
'list_keywords' => '',
'list_description' => '',
),
'template' =>
array (
'pagesize' => '20',
'mpagesize' => '20',
'page' => 'page.html',
'list' => 'list.html',
'category' => 'category.html',
'search' => 'search.html',
'show' => 'show.html',
),
'cat_field' => NULL,
'module_field' => NULL,
'html' => 0,
'chtml' => 0,
),
'displayorder' => '0',
'icon' => '',
'index' => '',
'pcatpost' => 0,
'topid' => '1',
'catids' =>
array (
0 => '1',
),
'is_post' => 1,
'url' => 'http://www.wenhuiw.com/zhishi/',
'total' => '请使用count标签查询',
'field' =>
array (
),
) |
parent |
array (
'id' => '1',
'tid' => '1',
'pid' => '0',
'mid' => 'news',
'pids' => '0',
'name' => '知识百科',
'dirname' => 'zhishi',
'pdirname' => '',
'child' => 0,
'disabled' => '0',
'ismain' => 1,
'childids' => 1,
'thumb' => '',
'show' => '1',
'content' => '',
'setting' =>
array (
'disabled' => '0',
'linkurl' => '',
'getchild' => '0',
'notedit' => '0',
'urlrule' => 2,
'seo' =>
array (
'list_title' => '[第{page}页{join}]{catpname}{join}{SITE_NAME}',
'list_keywords' => '',
'list_description' => '',
),
'template' =>
array (
'pagesize' => '20',
'mpagesize' => '20',
'page' => 'page.html',
'list' => 'list.html',
'category' => 'category.html',
'search' => 'search.html',
'show' => 'show.html',
),
'cat_field' => NULL,
'module_field' => NULL,
'html' => 0,
'chtml' => 0,
),
'displayorder' => '0',
'icon' => '',
'index' => '',
'pcatpost' => 0,
'topid' => '1',
'catids' =>
array (
0 => '1',
),
'is_post' => 1,
'url' => 'http://www.wenhuiw.com/zhishi/',
'total' => '请使用count标签查询',
'field' =>
array (
),
) |
related |
array (
1 =>
array (
'id' => '1',
'tid' => '1',
'pid' => '0',
'mid' => 'news',
'pids' => '0',
'name' => '知识百科',
'dirname' => 'zhishi',
'pdirname' => '',
'child' => 0,
'disabled' => '0',
'ismain' => 1,
'childids' => 1,
'thumb' => '',
'show' => '1',
'content' => '',
'setting' =>
array (
'disabled' => '0',
'linkurl' => '',
'getchild' => '0',
'notedit' => '0',
'urlrule' => 2,
'seo' =>
array (
'list_title' => '[第{page}页{join}]{catpname}{join}{SITE_NAME}',
'list_keywords' => '',
'list_description' => '',
),
'template' =>
array (
'pagesize' => '20',
'mpagesize' => '20',
'page' => 'page.html',
'list' => 'list.html',
'category' => 'category.html',
'search' => 'search.html',
'show' => 'show.html',
),
'cat_field' => NULL,
'module_field' => NULL,
'html' => 0,
'chtml' => 0,
),
'displayorder' => '0',
'icon' => '',
'index' => '',
'pcatpost' => 0,
'topid' => '1',
'catids' =>
array (
0 => '1',
),
'is_post' => 1,
'url' => 'http://www.wenhuiw.com/zhishi/',
'total' => '请使用count标签查询',
'field' =>
array (
),
),
2 =>
array (
'id' => '2',
'tid' => '1',
'pid' => '0',
'mid' => 'news',
'pids' => '0',
'name' => '绘图画画',
'dirname' => 'huihua',
'pdirname' => '',
'child' => 0,
'disabled' => '0',
'ismain' => 1,
'childids' => 2,
'thumb' => '',
'show' => '1',
'content' => '',
'setting' =>
array (
'disabled' => '0',
'linkurl' => '',
'getchild' => '0',
'notedit' => '0',
'urlrule' => 2,
'seo' =>
array (
'list_title' => '[第{page}页{join}]{catpname}{join}{SITE_NAME}',
'list_keywords' => '',
'list_description' => '',
),
'template' =>
array (
'pagesize' => '20',
'mpagesize' => '20',
'page' => 'page.html',
'list' => 'list.html',
'category' => 'category.html',
'search' => 'search.html',
'show' => 'show.html',
),
'cat_field' => NULL,
'module_field' => NULL,
'html' => 0,
'chtml' => 0,
),
'displayorder' => '0',
'icon' => '',
'index' => '',
'pcatpost' => 0,
'topid' => '2',
'catids' =>
array (
0 => '2',
),
'is_post' => 1,
'url' => 'http://www.wenhuiw.com/huihua/',
'total' => '请使用count标签查询',
'field' =>
array (
),
),
3 =>
array (
'id' => '3',
'tid' => '1',
'pid' => '0',
'mid' => 'news',
'pids' => '0',
'name' => '网络技术',
'dirname' => 'wangluo',
'pdirname' => '',
'child' => 0,
'disabled' => '0',
'ismain' => 1,
'childids' => 3,
'thumb' => '',
'show' => '1',
'content' => '',
'setting' =>
array (
'disabled' => '0',
'linkurl' => '',
'getchild' => '0',
'notedit' => '0',
'urlrule' => 2,
'seo' =>
array (
'list_title' => '[第{page}页{join}]{catpname}{join}{SITE_NAME}',
'list_keywords' => '',
'list_description' => '',
),
'template' =>
array (
'pagesize' => '20',
'mpagesize' => '20',
'page' => 'page.html',
'list' => 'list.html',
'category' => 'category.html',
'search' => 'search.html',
'show' => 'show.html',
),
'cat_field' => NULL,
'module_field' => NULL,
'html' => 0,
'chtml' => 0,
),
'displayorder' => '0',
'icon' => '',
'index' => '',
'pcatpost' => 0,
'topid' => '3',
'catids' =>
array (
0 => '3',
),
'is_post' => 1,
'url' => 'http://www.wenhuiw.com/wangluo/',
'total' => '请使用count标签查询',
'field' =>
array (
),
),
4 =>
array (
'id' => '4',
'tid' => '1',
'pid' => '0',
'mid' => 'news',
'pids' => '0',
'name' => '英语学习',
'dirname' => 'yingyu',
'pdirname' => '',
'child' => 0,
'disabled' => '0',
'ismain' => 1,
'childids' => 4,
'thumb' => '',
'show' => '1',
'content' => '',
'setting' =>
array (
'disabled' => '0',
'linkurl' => '',
'getchild' => '0',
'notedit' => '0',
'urlrule' => 2,
'seo' =>
array (
'list_title' => '[第{page}页{join}]{catpname}{join}{SITE_NAME}',
'list_keywords' => '',
'list_description' => '',
),
'template' =>
array (
'pagesize' => '20',
'mpagesize' => '20',
'page' => 'page.html',
'list' => 'list.html',
'category' => 'category.html',
'search' => 'search.html',
'show' => 'show.html',
),
'cat_field' => NULL,
'module_field' => NULL,
'html' => 0,
'chtml' => 0,
),
'displayorder' => '0',
'icon' => '',
'index' => '',
'pcatpost' => 0,
'topid' => '4',
'catids' =>
array (
0 => '4',
),
'is_post' => 1,
'url' => 'http://www.wenhuiw.com/yingyu/',
'total' => '请使用count标签查询',
'field' =>
array (
),
),
) |