python中用正则写一个身份证校验

import re
# Errors=['验证通过!','身份证号码位数不对!','身份证号码出生日期超出范围或含有非法字符!','身份证号码校验错误!','身份证地区非法!']
def checkIdcard(idcard):
    Errors = ['验证通过!', '身份证号码位数不对!', '身份证号码出生日期超出范围或含有非法字符!', '身份证号码校验错误!', '身份证地区非法!']
    area = {"11": "北京", "12": "天津", "13": "河北", "14": "山西", "15": "内蒙古", "21": "辽宁", "22": "吉林", "23": "黑龙江",
            "31": "上海", "32": "江苏", "33": "浙江", "34": "安徽", "35": "福建", "36": "江西", "37": "山东", "41": "河南", "42": "湖北",
            "43": "湖南", "44": "广东", "45": "广西", "46": "海南", "50": "重庆", "51": "四川", "52": "贵州", "53": "云南", "54": "西藏",
            "61": "陕西", "62": "甘肃", "63": "青海", "64": "宁夏", "65": "新疆", "71": "台湾", "81": "香港", "82": "澳门", "91": "国外"}
    idcard = str(idcard)
    idcard = idcard.strip()
    idcard_list = list(idcard)
    # 地区校验
    if (not area[(idcard)[0:2]]):
        print(Errors[4])
    # 15位身份号码检测
    if (len(idcard) == 15):
        if ((int(idcard[6:8]) + 1900) % 4 == 0 or (
                (int(idcard[6:8]) + 1900) % 100 == 0 and (int(idcard[6:8]) + 1900) % 4 == 0)):
            erg = re.compile(
                '[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$')  # //测试出生日期的合法性
        else:
            ereg = re.compile('[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$')  # //测试出生日期的合法性
        if (re.match(ereg, idcard)):
            print( Errors[0])
        else:
            print(Errors[2])
    # 18位身份号码检测
    elif (len(idcard) == 18):
        # 出生日期的合法性检查
        # 闰年月日:((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))
        # 平年月日:((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))
        if (int(idcard[6:10]) % 4 == 0 or (int(idcard[6:10]) % 100 == 0 and int(idcard[6:10]) % 4 == 0)):
            ereg = re.compile(
                '[1-9][0-9]{5}(19[0-9]{2}|20[0-9]{2})((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$')  # //闰年出生日期的合法性正则表达式
        else:
            ereg = re.compile(
                '[1-9][0-9]{5}(19[0-9]{2}|20[0-9]{2})((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$')  # //平年出生日期的合法性正则表达式
        # //测试出生日期的合法性
        if (re.match(ereg, idcard)):
            # //计算校验位
            S = (int(idcard_list[0]) + int(idcard_list[10])) * 7 + (int(idcard_list[1]) + int(idcard_list[11])) * 9 + (
                        int(idcard_list[2]) + int(idcard_list[12])) * 10 + (
                            int(idcard_list[3]) + int(idcard_list[13])) * 5 + (
                            int(idcard_list[4]) + int(idcard_list[14])) * 8 + (
                            int(idcard_list[5]) + int(idcard_list[15])) * 4 + (
                            int(idcard_list[6]) + int(idcard_list[16])) * 2 + int(idcard_list[7]) * 1 + int(
                idcard_list[8]) * 6 + int(idcard_list[9]) * 3
            Y = S % 11
            M = "F"
            JYM = "10X98765432"
            M = JYM[Y]  # 判断校验位
            if (M == idcard_list[17]):  # 检测ID的校验位
                print( Errors[0])
            else:
                print(Errors[3])
        else:
            print(Errors[2])
    else:
        print(Errors[1])
if __name__ == "__main__":
    while True:
        cdcard = input(u"请输入你的身份证号：")
        if cdcard == "exit":
            print( u"程序已结束！")
            break
        else:
           print( checkIdcard(cdcard))