如何使用正则表达式获取某些字符之前和之后的所有文本

Question

How can I get some characters from an url, using regular expressions for example:

https://www.facebook.com/aaaaaa/posts/123456789/sdd

How can I get the characters aaaa and 123456789 that are before and after /posts/ ?

Answer 1

import re

url = "https://www.facebook.com/aaaaaa/posts/123456789/sdd"

out = re.match('.+/(.+)/posts/(.+)/', url).groups()

print(out)

# Output:

('aaaaaa', '123456789')

Answer 2

url = "https://www.facebook.com/aaaaaa/posts/123456789/sdd"

to get 123456789 :

url.split('/')[5]

for aaaaaa

url.split('/')[3]