Question

我只想获取两个值之间的值。

我的文档：

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AED\/year"}},{"type":"price_type","id":"4","attributes":{"identifier":"yearly","label":"Yearly","name":"AED\/year"}}]},
      shareUrl:

我想获取{“ homepage”：与shareUrl之间的值：

我的代码：



import json
import requests
import re

url = 'https://m.propertyfinder.ae/en/rent/apartment-for-rent-dubai-dubai-marina-marina-promenade-delphine-tower-7276805.html'
response = requests.get(url)
soup = BeautifulSoup(response.text, 'lxml')
all_scripts = soup.find_all('script')
images_script = all_scripts[6]
#images = re.search('{"type":"whatsapp","value":"([^"]+)" v', images_script.text).group(1)
#get_images = re.findall('"{"homepage":"([^"]+)"shareUrl:', images_script.text)

#"homepage":"","cts":"","small":"","medium":"","thumb":""}}

the_images = re.findall('"homepage":"([^"]+)","cts":"([^"]+)","small":"([^"]+)","medium":"([^"]+)","thumb":"([^"]+)"', images_script.text)
counter = 0
for myimg in the_images:
    print(myimg[3])
    counter = counter+1
    print(counter)

它可以完美工作，但是它返回所有值，因为该页面还包含其他列表图像。但我想限制它

{“首页”和shareUrl：

我的正则表达式需要进行哪些更改？

Answer 1

您可以使用两次正则表达式。

ma = re.search("(homepage.*)\n\s{0,}shareUrl", images_script.text)
the_images = re.findall('"homepage":"([^"]+)","cts":"([^"]+)","small":"([^"]+)","medium":"([^"]+)","thumb":"([^"]+)"', ma.groups()[0])

第一个正则表达式在“主页”和“ shareUrl”之间找到文本，并在第二个中使用它来获取“ http ... jpg”。（请注意：调整\ n \ s {0，}以获得返回值和空格。）

Answer 2

当您想要对返回的内容进行更多控制时，

group通常在re.match函数中使用。从我的角度来看，您只是想将所有结果都找回来。 re.findall就是这样做的-除非您的正则表达式中有“或”语句（用|表示），否则re.findall将返回与查询匹配的字符串列表。只需迭代列表并返回您想要的内容即可。查看您的正则表达式，它似乎很具体，因此可能只有第一个结果可以。像这样：

webpage = requests.get(url).content
regex_experssion = re.compile("your_expression")
list_of_matches = regex_expression.findall(webpage)
return list_of_matches[0]

或

for i in range(len(list_of_matches)):
    #run code to find relevant one

编辑：如果真正的问题是正则表达式查询本身，而不是python模块/它的返回值，则强烈建议使用在线正则表达式编辑器，并解释不同的标记： https://regex101.com/

Answer 3

这是一个SimplifiedDoc解决方案。大多数代码会重用

import re
import requests
from simplified_scrapy.simplified_doc import SimplifiedDoc 
url = 'https://m.propertyfinder.ae/en/rent/apartment-for-rent-dubai-dubai-marina-marina-promenade-delphine-tower-7276805.html'
response = requests.get(url)
doc = SimplifiedDoc(response.text)
html = '"homepage":'+doc.getSection(start='"homepage":',end='shareUrl:')

the_images = re.findall('"homepage":"([^"]+)","cts":"([^"]+)","small":"([^"]+)","medium":"([^"]+)","thumb":"([^"]+)"', html)
counter = 0
for myimg in the_images:
  print(myimg[3])
  counter = counter+1
  print(counter)

python如何获取两个值之间的值

3 个答案: