python遍历文件中邮箱地址，ip地址，银行卡号正则表达式

import os
import re
baseDir = "/Users/huangzhipeng/Desktop"


def get_email(path):
    f = open(path, 'r', encoding="utf-8")
    content = f.read()
    # mail_re = re.compile(r"(\w+@\w+\.\w+)")
    mail_re = re.compile(r"\b[0-9a-zA-Z_]{0,19}@[0-9a-zA-Z]{1,13}\.[com,cn,net]{1,3}\b")
    ret = mail_re.findall(content)
    print(ret)


def get_ip(path):
    f = open(path, 'r', encoding="utf-8")
    content = f.read()
    mail_re = re.compile(r'\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b')
    ret = mail_re.findall(content)
    print(ret)


def get_bank_no(path):
    def luhn(no):
        no = no[::-1]
        ji = no[::2]
        ou = no[1::2]
        ji_sum = 0
        for i in ji:
            ji_sum += int(i)
        ou_sum = 0
        for j in ou:
            j = int(j)*2
            if j >= 10:
                j = j-9
            ou_sum += j
        if (ji_sum + ou_sum) % 10 == 0:
            return True
        return False
    f = open(path, 'r', encoding="utf-8")
    content = f.read()
    mail_re = re.compile(r'\b[1-9]{1}\d{14}|\d{18}\b')
    ret = mail_re.findall(content)
    ret = [item for item in ret if luhn(item)]
    print(ret)


def fun(path):
    try:
        child = os.listdir(path)
    except Exception as e:
        return
    for item in child:
        temp_path = os.path.join(path, item)
        if os.path.isdir(temp_path):
            fun(temp_path)
        else:
            if os.path.splitext(temp_path)[1]=='.txt':
                print(temp_path)
                # get_email(temp_path)
                # get_ip(temp_path)
                get_bank_no(temp_path)

fun(baseDir)