Python模块pyquery应用技巧
【摘要】
公众号 yk 坤帝
后台回复 pyquery 获取全部源代码
1. 初始化部分
1.1 字符串初始化
1.2 URL初始化
1.3 文件初始化
2. 基本CSS选择器
3. 查找元素
3.1 查找子元素
3.2 查找父元素
3.3 查找兄弟元素
4. 遍历单个元素
5. 获取属性，文本，HT...
公众号 yk 坤帝
后台回复 pyquery 获取全部源代码
1. 初始化部分
1.1 字符串初始化
1.2 URL初始化
1.3 文件初始化
2. 基本CSS选择器
3. 查找元素
3.1 查找子元素
3.2 查找父元素
3.3 查找兄弟元素
4. 遍历单个元素
5. 获取属性，文本，HTML
5.1 获取属性
5.2 获取文本
5.3 获取HTML
6. DOM操作
6.1 addClass、removeClass
6.2 attr、css
6.3 remove
7. 伪类选择器
1. 初始化部分
1.1 字符串初始化
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html = '''
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<div>
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<ul>
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<li class="item-0">first item</li>
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<li class="item-1"><a href="link2.html">second item</a></li>
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<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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print(doc('li'))
1.2 URL初始化
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from pyquery import PyQuery as pq
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doc = pq(url='http://www.baidu.com')
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print(doc('head'))
1.3 文件初始化
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from pyquery import PyQuery as pq
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doc = pq(filename='demo.html')
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print(doc('li'))
2. 基本CSS选择器
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html = '''
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<div id="container">
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<ul class="list">
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<li class="item-0">first item</li>
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<li class="item-1"><a href="link2.html">second item</a></li>
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<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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print(doc('#container .list li'))
3. 查找元素
3.1 查找子元素
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公众号 yk 坤帝
-
-
后台回复 pyquery 获取全部源代码
-
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html = '''
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<div id="container">
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<ul class="list">
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<li class="item-0">first item</li>
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<li class="item-1"><a href="link2.html">second item</a></li>
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<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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items = doc('.list')
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print(type(items))
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print(items)
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lis = items.find('li')
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print(type(lis))
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print(lis)
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lis = items.children()
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print(type(lis))
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print(lis)
3.2 查找父元素
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html = '''
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<div id="container">
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<ul class="list">
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<li class="item-0">first item</li>
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<li class="item-1"><a href="link2.html">second item</a></li>
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<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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items = doc('.list')
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container = items.parent()
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print(type(container))
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print(container)
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html = '''
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<div class="wrap">
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<div id="container">
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<ul class="list">
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<li class="item-0">first item</li>
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<li class="item-1"><a href="link2.html">second item</a></li>
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<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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items = doc('.list')
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parents = items.parents()
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print(type(parents))
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print(parents)
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parent = items.parents('.wrap')
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print(parent)
3.3 查找兄弟元素
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html = '''
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<div class="wrap">
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<div id="container">
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<ul class="list">
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<li class="item-0">first item</li>
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<li class="item-1"><a href="link2.html">second item</a></li>
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<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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li = doc('.list .item-0.active')
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print(li.siblings())
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html = '''
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<div class="wrap">
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<div id="container">
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<ul class="list">
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<li class="item-0">first item</li>
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<li class="item-1"><a href="link2.html">second item</a></li>
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<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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li = doc('.list .item-0.active')
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print(li.siblings('.active'))
4. 遍历单个元素
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html = '''
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<div class="wrap">
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<div id="container">
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<ul class="list">
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<li class="item-0">first item</li>
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<li class="item-1"><a href="link2.html">second item</a></li>
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<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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li = doc('.item-0.active')
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print(li)
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html = '''
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<div class="wrap">
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<div id="container">
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<ul class="list">
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<li class="item-0">first item</li>
-
<li class="item-1"><a href="link2.html">second item</a></li>
-
<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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lis = doc('li').items()
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print(type(lis))
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for li in lis:
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print(li)
5. 获取属性，文本，HTML
5.1 获取属性
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html = '''
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<div class="wrap">
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<div id="container">
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<ul class="list">
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<li class="item-0">first item</li>
-
<li class="item-1"><a href="link2.html">second item</a></li>
-
<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
-
<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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a = doc('.item-0.active a')
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print(a)
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print(a.attr('href'))
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print(a.attr.href)
5.2 获取文本
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html = '''
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<div class="wrap">
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<div id="container">
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<ul class="list">
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<li class="item-0">first item</li>
-
<li class="item-1"><a href="link2.html">second item</a></li>
-
<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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a = doc('.item-0.active a')
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print(a)
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print(a.text())
5.3 获取HTML
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html = '''
-
<div class="wrap">
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<div id="container">
-
<ul class="list">
-
<li class="item-0">first item</li>
-
<li class="item-1"><a href="link2.html">second item</a></li>
-
<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
-
<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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li = doc('.item-0.active')
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print(li)
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print(li.html())
6. DOM操作
6.1 addClass、removeClass
-
html = '''
-
<div class="wrap">
-
<div id="container">
-
<ul class="list">
-
<li class="item-0">first item</li>
-
<li class="item-1"><a href="link2.html">second item</a></li>
-
<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
-
<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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li = doc('.item-0.active')
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print(li)
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li.removeClass('active')
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print(li)
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li.addClass('active')
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print(li)
6.2 attr、css
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html = '''
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<div class="wrap">
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<div id="container">
-
<ul class="list">
-
<li class="item-0">first item</li>
-
<li class="item-1"><a href="link2.html">second item</a></li>
-
<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
-
<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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li = doc('.item-0.active')
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print(li)
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li.attr('name', 'link')
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print(li)
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li.css('font-size', '14px')
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print(li)
6.3 remove
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html = '''
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<div class="wrap">
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Hello, World
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<p>This is a paragraph.</p>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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wrap = doc('.wrap')
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print(wrap.text())
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wrap.find('p').remove()
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print(wrap.text())
7. 伪类选择器
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html = '''
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<div class="wrap">
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<div id="container">
-
<ul class="list">
-
<li class="item-0">first item</li>
-
<li class="item-1"><a href="link2.html">second item</a></li>
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<li class="item-0 active"><a href="link3.html"><span class="bold">third item</span></a></li>
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<li class="item-1 active"><a href="link4.html">fourth item</a></li>
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<li class="item-0"><a href="link5.html">fifth item</a></li>
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</ul>
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</div>
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</div>
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'''
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from pyquery import PyQuery as pq
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doc = pq(html)
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li = doc('li:first-child')
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print(li)
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li = doc('li:last-child')
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print(li)
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li = doc('li:nth-child(2)')
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print(li)
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li = doc('li:gt(2)')
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print(li)
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li = doc('li:nth-child(2n)')
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print(li)
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li = doc('li:contains(second)')
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print(li)
公众号 yk 坤帝
后台回复 pyquery 获取全部源代码
文章来源: blog.csdn.net，作者：yk 坤帝，版权归原作者所有，如需转载，请联系作者。
原文链接：blog.csdn.net/qq_45803923/article/details/123672317
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