<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _filter(self):
 """ delete the punctuation """

        pattern = u"[\s+\.\!\-\/_,$%^*(+\"\']+|[+——！】【，。？?:、：~@#￥%……&*“”（）]+"
        self.m = re.sub(pattern, "", self.m)