如何从python中的字符串获取url

2024-05-29 00:22:44 发布

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我使用curl获取网页并将其存储在python中的一个变量中。在

var = '<body><img src=\"https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg\" style=\"display: none;\"/><div class=\"wrapper\">'

我只需要字符串的链接,例如:

^{pr2}$

我尝试通过将正则表达式的开始定义为“(https | http)和结束为”:

^{3}$

但我没有得到输出。请帮我一下,谢谢。在

>>>[]

Tags: inhttpssrc网页imgvarbodycdn
3条回答

使用re.search

import re
var = '<body><img src=\"https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg\" style=\"display: none;\"/><div class=\"wrapper\">'
m = re.search("src=\"(?P<url>.*?)\"", var)
if m:
    print m.group('url')

输出:

^{pr2}$

@Manoj,还可以使用split()方法多次检索src属性的值,如下所示。在

»使用lambda函数(1行语句)

var = '<body><img src=\"https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg\" style=\"display: none;\"/><div class=\"wrapper\">'

get_url = lambda html: html.split('=')[1].split('\"')[1]
print(get_url(var))

»产出

^{pr2}$

让我们在多个语句中扩展上述方法,以了解实际的直接过程。在

var = '<body><img src=\"https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg\" style=\"display: none;\"/><div class=\"wrapper\">'
print(var, "\n")
# <body><img src="https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg" style="display: none;"/><div class="wrapper">

parts1 = var.split("=")
print(parts1, "\n")
# ['<body><img src', '"https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg" style', '"display: none;"/><div class', '"wrapper">']

parts2 = parts1[1].split('\"')
print(parts2, "\n")
# ['', 'https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg', ' style']

print(parts2[1])
# https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg

»产出

E:\Users\Rishikesh\Python3\Practice\Temp>python GetUrls.py
<body><img src="https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg" style="display: none;"/><div class="wrapper">

['<body><img src', '"https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg" style', '"display: none;"/><div class', '"wrapper">']

['', 'https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg', ' style']



https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg

使用BeautifulGroup,您可以搜索a或{},并检查属性:

例如:

from bs4 import BeautifulSoup as soup

var = '<body><a href=\"https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg\"><img src=\"https://cdn.neow.in/news/images/uploaded/2018/06/Gaming sloop, preview group, hardware _mediump.jpg\" style=\"display: none;\"/></a><div class=\"wrapper\">'
page_soup = soup(var, "html.parser")

links = []

for elm in page_soup.findAll(['a', 'img']):
    if elm.has_attr('href'):
        links.append(elm.get('href'))
    if elm.has_attr('src'):
        links.append(elm.get('src'))

print(links)

Demo

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