python系列之PyQuery的用法
Posted 枯木逢春
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1.了解
pyquery库是jQuery的Python实现，能够以jQuery的语法来操作解析 HTML 文档，易用性和解析速度都很好。
2.安装
pip install pyquery
3引用
from pyquery import PyQuery as pq
4.初始化
1）字符串
html = """ <html lang="en"> <head> simple good <title>PyQuery</title> </head> <body> <ul id="container" class="list"> <li class="object-1">Python</li> <li class="object-2">amazing</li> <li class="object-3">wonderful</li> </ul> </body> </html> """ doc = pq(html)
2)url
response = pq(url=\'https://www.baidu.com\') print(response("head"))
3）文件
#filename参数为html文件路径 test_html = pq(filename = \'test.html\') print(type(test_html)) print(test_html)
5.使用
#-*- coding: UTF-8 -*- from pyquery import PyQuery as pq html = """ <html lang="en"> <head> simple good <title>PyQuery</title> </head> <body> <ul id="container" class="list"> <li class="object-1">Python</li> <li class="object-2">amazing</li> <li class="object-3">wonderful</li> </ul> </body> </html> """ doc = pq(html) #常用的css选择器 print(doc) #打印id为container的标签 print(doc(\'#container\')) #打印class为object-1的标签 print(doc(\'.object-1\')) #打印body print(doc(\'body\')) #多种css选择器使用 print(doc(\'html #container\')) #打印.list的li print(doc(\'#container .list li\')) print(\'-----------------------------------\') #伪类选择器 #打印第二个孩子 print(doc(\'li:nth-child(2)\')) #打印第一个孩子 print(doc(\'li:first-child\')) #打印最后一个孩子 print(doc(\'li:last-child\')) #打印含Python的li print(doc("li:contains(\'Python\')")) print(\'-----------------------------------\') #查找 #查找id为container print(doc.find(\'#container\')) #查找li print(doc.find(\'li\')) #查找id为container的孩子 print(doc.find(\'#container\').children()) #查找类为object-2的父亲 print(doc.find(\'.object-2\').parent()) #查找类为object-2的兄弟姐妹 print(doc.find(\'.object-2\').siblings()) print(\'-----------------------------------\') #获取标签属性 #获取attr为class print(doc.find(\'.object-2\').attr(\'class\')) #标签内的文本 print(doc.find(\'.object-1\').text()) #去掉li标签 print(doc.find(\'#container\').remove(\'li\').text()) print(\'----------------------------------\')
输出如下：
<html lang="en"> <head> simple good <title>PyQuery</title> </head> <body> <ul id="container" class="list"> <li class="object-1">Python</li> <li class="object-2">amazing</li> <li class="object-3">wonderful</li> </ul> </body> </html> <ul id="container" class="list"> <li class="object-1">Python</li> <li class="object-2">amazing</li> <li class="object-3">wonderful</li> </ul> <li class="object-1">Python</li> <body> <ul id="container" class="list"> <li class="object-1">Python</li> <li class="object-2">amazing</li> <li class="object-3">wonderful</li> </ul> </body> <ul id="container" class="list"> <li class="object-1">Python</li> <li class="object-2">amazing</li> <li class="object-3">wonderful</li> </ul> ----------------------------------- <li class="object-2">amazing</li> <li class="object-1">Python</li> <li class="object-3">wonderful</li> <li class="object-1">Python</li> ----------------------------------- <ul id="container" class="list"> <li class="object-1">Python</li> <li class="object-2">amazing</li> <li class="object-3">wonderful</li> </ul> <li class="object-1">Python</li> <li class="object-2">amazing</li> <li class="object-3">wonderful</li> <li class="object-1">Python</li> <li class="object-2">amazing</li> <li class="object-3">wonderful</li> <ul id="container" class="list"> <li class="object-1">Python</li> <li class="object-2">amazing</li> <li class="object-3">wonderful</li> </ul> <li class="object-1">Python</li> <li class="object-3">wonderful</li> ----------------------------------- object-2 Python ----------------------------------
参考：https://www.jianshu.com/p/5def029dbdf8
https://www.jianshu.com/p/770c0cdef481
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