Python3使用正则表达式做信息脱敏

re.sub共有五个参数。
其中三个必选参数：pattern, repl, string
两个可选参数：count, flags

第一个参数pattern：就是正则式字符串或者正则式对象
第二个参数repl：就是要用什么东西去替换pattern匹配到的字符串
第三个参数string：就是对哪个字符串进行匹配与替换
第四个参数count：就是只替换前几个，如果是0则全部都替换

import re

class Desensitization(object):
    def __init__(self, email=None, mobile=None, identity_card=None, address=None):
        self.email = email
        self.mobile = mobile
        self.identity_card = identity_card
        self.address = address

    def get_email_complex(self):
        # 通过@分开字符串
        mail_split_list = self.email.split('@')
        # 前面2位显示
        dis_mail_pre = mail_split_list[0][:2]
        # 其它位数隐藏
        hide_mail_pre = mail_split_list[0][2:]
        # 最后2位显示
        dis_mail_last = mail_split_list[-1][-2:]
        # 其它位数隐藏
        hide_mail_last = mail_split_list[-1][:-2]
        # 使用re.sub过滤
        result_hide_mail_pre = re.sub(hide_mail_pre, len(hide_mail_pre) * '*', hide_mail_pre)
        # 使用re.sub过滤
        result_hide_mail_last = re.sub(hide_mail_last, len(hide_mail_last) * '*', hide_mail_last)
        # 将结果集合起来
        desensitization_mail = dis_mail_pre + result_hide_mail_pre + '@' + result_hide_mail_last + dis_mail_last
        return desensitization_mail

    def get_email(self):
        hide_mail_content = self.email[2:-2]
        result = re.sub(hide_mail_content, len(hide_mail_content) * '*', self.email)
        return result

    def get_mobile(self):
        hide_mail_content = self.mobile[3:-4]
        result = re.sub(hide_mail_content, len(hide_mail_content) * '*', self.mobile)
        return result

    def get_identity_card(self):
        hide_identity_card = self.identity_card[3:-4]
        result = re.sub(hide_identity_card, len(hide_identity_card) * '*', self.identity_card)
        return result

    def get_address(self):
        hide_address_content = self.address[3:-3]
        result = re.sub(hide_address_content, len(hide_address_content) * '*', self.address)
        return result


if __name__ == "__main__":
    result_email = Desensitization(email='[email protected]')
    print(result_email.get_email())

    result_mobile = Desensitization(mobile='18911112222')
    print(result_mobile.get_mobile())

    result_id = Desensitization(identity_card='123123200001011234')
    print(result_id.get_identity_card())

    result_address = Desensitization(address="上海市虹口区某某路某某号123室")
    print(result_address.get_address())

做文字多选过滤处理。

 # 在正则表达式语法中，竖线“|”表示二选一或多选一。
    def check_filter(keywords, text):
        return re.sub("|".join(keywords), "***", text)

    keywords = ("暴力", "色情", "其他关键字")
    text = "这句话里不包含暴力，也不包含色情，但是可能包含其他关键字"
    print(check_filter(keywords, text))