import re
def filter(line):
res=re.sub('[a-zA-Z0-9’!"#$%&'()*+,-./:;<=>?@,。?★、…【】《》?“”‘’![\]^_`{|}~s]+', "", line)
return res
s = 'www.baidu.com'
aa = filter(s)
print(aa)

import re
def filter(line):
res=re.sub('[a-zA-Z0-9’!"#$%&'()*+,-./:;<=>?@,。?★、…【】《》?“”‘’![\]^_`{|}~s]+', "", line)
return res
s = 'www.baidu.com'
aa = filter(s)
print(aa)