Python 3 - 无法使用re库进行打印

Question

I have this code:

import requests
from bs4 import BeautifulSoup
import re


url = "http://www.rockefeller.edu/research/areas/summary.php?id=1"
r = requests.get(url)
soup = BeautifulSoup(r.content, 'html.parser')
for x in (soup.find_all(string=re.compile('comment'))):
    print(x.parent)
    print(x.parent.name)

It prints out nothing when I heard that it should print <a href="/about/comments">Comments</a> and a I am using:
requests: 2.7.0
beautifulsoup4: 4.4.0
Python : 3.4.3
running on python Idle: Macbook Pro

Answer 1

re.compile() match case-sensitively by default. You got to set flag re.I to make it case-insensitive. See the following demo example :

import requests
from bs4 import BeautifulSoup
import re


url = "http://www.rockefeller.edu/research/areas/summary.php?id=1"
r = requests.get(url)
soup = BeautifulSoup(r.content, 'html.parser')

for x in (soup.find_all(True,text=re.compile(r'comment', re.I))):
    print(x)

output :

<a href="/about/comments">Comments</a>