# 字符串初始化
html = '''
<div>
<ul>
<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>
<li class = "item-0"><a href = "link5.html">fifthth item</a></li>
</ul>
</div>
''' from pyquery import PyQuery as pq
doc = pq(html)
print(doc('li')) # url初始化
from pyquery import PyQuery as pq
doc = pq(url = "http://www.baidu.com")
print(doc("head")) # 文件初始化
from pyquery import PyQuery as pq
doc = pq(filename = "demo.html")
print(doc('li')) # 基本CSS选择器
html = '''
<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>
<li class = "item-0"><a href = "link5.html">fifthth item</a></li>
</ul>
</div>
'''
from pyquery import PyQuery as pq
doc = pq(html)
# 注意下面id 前面需要加上#,class 前面需要加上.
print(doc('#container .list li')) # 查找元素
# 子元素
html = '''
<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>
<li class = "item-0"><a href = "link5.html">fifthth item</a></li>
</ul>
</div>
'''
from pyquery import PyQuery as pq
doc = pq(html)
items = doc('.list')
print(type(items))
print(items)
lis = items.find('li')
print(type(lis))
print(lis) lis = items.children()
print(type(lis))
print(lis) lis = items.children('.active')
print(lis) # 父元素
html = '''
<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>
<li class = "item-0"><a href = "link5.html">fifthth item</a></li>
</ul>
</div>
'''
from pyquery import PyQuery as pq
doc = pq(html)
items = doc('.list')
container = items.parent()
print(type(container))
print(container) 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>
<li class = "item-0"><a href = "link5.html">fifthth item</a></li>
</ul>
</div>
</div>
'''
from pyquery import PyQuery as pq
doc = pq(html)
items = doc('.list')
parents = items.parents()
print(type(parents))
print(parents) parents = items.parents('.wrap')
print(parents)
# 兄弟元素
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>
<li class = "item-0"><a href = "link5.html">fifthth item</a></li>
</ul>
</div>
</div>
'''
from pyquery import PyQuery as pq
doc = pq(html)
# 注意下面item-0后面直接是. 没有空格
li = doc('.list .item-0.active')
print(li.siblings()) print(li.siblings('.active')) # 遍历
# 单个元素
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>
<li class = "item-0"><a href = "link5.html">fifthth item</a></li>
</ul>
</div>
</div>
'''
from pyquery import PyQuery as pq
doc = pq(html)
li = doc('.item-0.active')
print(li) 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>
<li class = "item-0"><a href = "link5.html">fifthth item</a></li>
</ul>
</div>
</div>
'''
from pyquery import PyQuery as pq
doc = pq(html)
lis = doc('li').items()
print(type(lis))
for li in lis:
print(li) # 获取信息
# 获取属性
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>
<li class = "item-0"><a href = "link5.html">fifthth item</a></li>
</ul>
</div>
</div>
'''
from pyquery import PyQuery as pq
doc = pq(html)
a = doc('.item-0.active a')
print(a)
# 获取属性的两种方法
print(a.attr('href'))
print(a.attr.href) # 获取文本
print(a.text()) # 获取html
from pyquery import PyQuery as pq
doc = pq(html)
li = doc('.item-0.active')
print(li)
# 得到<li>标签里面的代码
print(li.html()) # DOM操作
# addClass、removeClass
from pyquery import PyQuery as pq
doc = pq(html)
li = doc('.item-0.active')
print(li)
li.remove_class('active')
print(li)
li.add_class('active')
print(li) # attr CSS
li.attr('name', 'link')
print(li)
li.css('font-size', '14px')
print(li) # remove
html = '''
<div class = "wrap">
Hello,World
<p>This is a paragraph</p>
</div>
'''
from pyquery import PyQuery as pq
doc = pq(html)
wrap = doc('.wrap')
print(wrap.text())
wrap.find('p').remove()
print(wrap.text()) # 伪类选择器
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>
<li class = "item-0"><a href = "link5.html">fifthth item</a></li>
</ul>
</div>
</div>
'''
from pyquery import PyQuery as pq
doc = pq(html)
# 获取第一个元素
li = doc('li:first-child')
print(li)
# 获取最后一个元素
li = doc('li:last-child')
print(li)
# 获取第二个元素
li = doc('li:nth-child(2)')
print(li)
# 获取下标为2的元素后面的所有元素（下标从0开始）
li = doc('li:gt(2)')
print(li)
# 获取下标为偶数的元素
li = doc('li:nth-child(2n)')
print(li)
# 获取内容包含second 的元素
li = doc('li:contains(second)')
print(li)