python中如何去除标点符号

import re

s ="string. With. Punctuation?"

s = re.sub(r'[^\w\s]','',s)

import re, string, timeit

s ="string. With. Punctuation"

exclude = set(string.punctuation)

table = string.maketrans("","")

regex = re.compile('[%s]' % re.escape(string.punctuation))

def test_set(s):

    return ''.join(ch for ch in s if ch not in exclude)

def test_re(s):

    return regex.sub('', s)

def test_trans(s):

    return s.translate(table, string.punctuation)

def test_repl(s):

    for c in string.punctuation:

        s=s.replace(c,"")

    return s

print"sets :",timeit.Timer('f(s)', 'from __main__ import s,test_set as f').timeit(1000000)

print"regex :",timeit.Timer('f(s)', 'from __main__ import s,test_re as f').timeit(1000000)

print"translate :",timeit.Timer('f(s)', 'from __main__ import s,test_trans as f').timeit(1000000)

print"replace :",timeit.Timer('f(s)', 'from __main__ import s,test_repl as f').timeit(1000000)

out_put:

# sets : 19.8566138744

# regex : 6.86155414581

# translate : 2.12455511093

# replace : 28.4436721802