python+selenium+ find_element_by_css_selector方法使用
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1.通过类class获取
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<h1 class="important">
This heading is very important.
</h1>
<p class="important">
This paragraph is very important.
</p>
<p class="important warning">
This paragraph is a very important warning.
</p> -
1> 获取class值为important的h1标签
find_element_by_css_selector(h1.importane)
2>获取所有class值为important的标签find_element_by_css_selector(*.importane)或者find_element_by_css_selector(.importane)
3>获取class值为important warning的标签find_element_by_css_selector(.importane.warning)
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2通过id获取
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首先,ID 选择器前面有一个 # 号 - 也称为棋盘号或井号
<
p
id="intro">This is a paragraph of introduction.</
p
>
find_element_by_css_selector(#"intro")
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3.属性选择器
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1>.
<
a
title="W3School Home" href="http://w3school.com.cn">W3School</
a
>
属性中包含了title和href,
find_element_by_css_selector('a[title][href]')
2>
<
a
href="http://www.w3school.com.cn/about_us.asp">About W3School</
a
>
定位属性中href="http://www.w3school.com.cn/about_us.asp"的元素,
find_element_by_css_selector('a[href="http://www.w3school.com.cn/about_us.asp"]')
3>
<
a
href="http://www.w3school.com.cn/" title="W3School">W3School</
a
>
通过href和title来定位
find_element_by_css_selector("a[href='http://www.w3school.com.cn/about_us.asp'][title='W3School']")
4>部分属性定位
<
h1
>可以应用样式:</
h1
>
<
img
title="Figure 1" src="/i/figure-1.gif" />
<
img
title="Figure 2" src="/i/figure-2.gif" />
<
hr
/>
<
h1
>无法应用样式:</
h1
>
<
img
src="/i/figure-1.gif" />
<
img
src="/i/figure-2.gif" />
定位title中包含有figure的元素:
find_element_by_css_selector("image[title~='figure']")
5>其他
[abc^="def"] 选择 abc 属性值以 "def" 开头的所有元素
[abc$="def"] 选择 abc 属性值以 "def" 结尾的所有元素
[abc*="def"] 选择 abc 属性值中包含子串 "def" 的所有元素 -
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4.后代选择器
<
h1
>This is a <
em
>important</
em
> heading</
h1
>
<
p
>This is a <
em
>important</
em
> paragraph.</
p
>
find_element_by_css_selector("h1 em")
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