我在一个正则表达式后,将验证一个完整的复杂的英国邮政编码只在输入字符串。所有不常见的邮政编码形式必须包括以及通常。例如:
匹配
CW3 9不锈钢 SE5 0EG SE50EG Se5 0eg WC2H 7LT
不匹配
aWC2H 7LT WC2H 7LTa WC2H
我怎么解决这个问题?
我在一个正则表达式后,将验证一个完整的复杂的英国邮政编码只在输入字符串。所有不常见的邮政编码形式必须包括以及通常。例如:
匹配
CW3 9不锈钢 SE5 0EG SE50EG Se5 0eg WC2H 7LT
不匹配
aWC2H 7LT WC2H 7LTa WC2H
我怎么解决这个问题?
当前回答
前半段邮政编码有效格式
[a - z] [a - z][0 - 9]的[a -ž] [a - z] [a - z] [0 - 9] [0 - 9] [a - z] [0 - 9] [0 - 9] [a - z] [a - z] [0 - 9] [a - z] [a - z]的[a -ž] [a - z][0 - 9]的[a -ž] [a - z] [0 - 9]
异常 位置1 - QVX未使用 位置2 -除GIR 0AA外,IJZ不使用 位置3 - AEHMNPRTVXY只使用 位置4 - ABEHMNPRVWXY
邮政编码的后半部分
[0 - 9] [a - z]的[a -ž]
异常 位置2+3 - CIKMOV未使用
记住,不是所有可能的代码都被使用了,所以这个列表是有效代码的必要条件,而不是充分条件。只是匹配所有有效代码的列表可能会更容易?
其他回答
通过经验测试和观察,以及https://en.wikipedia.org/wiki/Postcodes_in_the_United_Kingdom#Validation的确认,以下是我的Python正则表达式版本,可以正确地解析和验证英国邮政编码:
UK_POSTCODE_REGEX = r ' (? P < postcode_area > [a - z] {1,2}) (? P <区> (?:[0 - 9]{1,2})| (?:[0 - 9][a - z])) (? P <部门> [0 - 9])(? P <邮编> [a - z]{2})”
这个正则表达式很简单,并且有捕获组。它不包括所有合法的英国邮政编码的验证,而只考虑字母与数字的位置。
下面是我在代码中如何使用它:
@dataclass
class UKPostcode:
postcode_area: str
district: str
sector: int
postcode: str
# https://en.wikipedia.org/wiki/Postcodes_in_the_United_Kingdom#Validation
# Original author of this regex: @jontsai
# NOTE TO FUTURE DEVELOPER:
# Verified through empirical testing and observation, as well as confirming with the Wiki article
# If this regex fails to capture all valid UK postcodes, then I apologize, for I am only human.
UK_POSTCODE_REGEX = r'(?P<postcode_area>[A-Z]{1,2})(?P<district>(?:[0-9]{1,2})|(?:[0-9][A-Z]))(?P<sector>[0-9])(?P<postcode>[A-Z]{2})'
@classmethod
def from_postcode(cls, postcode):
"""Parses a string into a UKPostcode
Returns a UKPostcode or None
"""
m = re.match(cls.UK_POSTCODE_REGEX, postcode.replace(' ', ''))
if m:
uk_postcode = UKPostcode(
postcode_area=m.group('postcode_area'),
district=m.group('district'),
sector=m.group('sector'),
postcode=m.group('postcode')
)
else:
uk_postcode = None
return uk_postcode
def parse_uk_postcode(postcode):
"""Wrapper for UKPostcode.from_postcode
"""
uk_postcode = UKPostcode.from_postcode(postcode)
return uk_postcode
下面是单元测试:
@pytest.mark.parametrize(
'postcode, expected', [
# https://en.wikipedia.org/wiki/Postcodes_in_the_United_Kingdom#Validation
(
'EC1A1BB',
UKPostcode(
postcode_area='EC',
district='1A',
sector='1',
postcode='BB'
),
),
(
'W1A0AX',
UKPostcode(
postcode_area='W',
district='1A',
sector='0',
postcode='AX'
),
),
(
'M11AE',
UKPostcode(
postcode_area='M',
district='1',
sector='1',
postcode='AE'
),
),
(
'B338TH',
UKPostcode(
postcode_area='B',
district='33',
sector='8',
postcode='TH'
)
),
(
'CR26XH',
UKPostcode(
postcode_area='CR',
district='2',
sector='6',
postcode='XH'
)
),
(
'DN551PT',
UKPostcode(
postcode_area='DN',
district='55',
sector='1',
postcode='PT'
)
)
]
)
def test_parse_uk_postcode(postcode, expected):
uk_postcode = parse_uk_postcode(postcode)
assert(uk_postcode == expected)
看起来我们将使用^(GIR ?0AA|[a - pr - uwyz]([0-9]{1,2}|([a - hk - y][0-9]([0-9ABEHMNPRV-Y])?)|[0-9][a - hjkps - uw])? [0-9][ABD-HJLNP-UW-Z]{2})$,这是上面Minglis建议的略有修改的版本。
然而,我们将不得不调查到底是什么规则,因为上面列出的各种解决方案似乎适用于不同的规则,哪些字母是允许的。
经过一番研究,我们找到了更多的信息。显然,“govtalk.gov.uk”上的一个页面会指向邮政编码规范govtalk-postcodes。它指向XML schema中的一个XML模式,该模式提供了邮政编码规则的“伪正则表达式”语句。
我们用它做了一些修改,得到了下面的表达式:
^((GIR &0AA)|((([A-PR-UWYZ][A-HK-Y]?[0-9][0-9]?)|(([A-PR-UWYZ][0-9][A-HJKSTUW])|([A-PR-UWYZ][A-HK-Y][0-9][ABEHMNPRV-Y]))) &[0-9][ABD-HJLNP-UW-Z]{2}))$
这使得空格是可选的,但限制您只能使用一个空格(将'&'替换为'{0,}表示无限空格)。它假定所有文本都必须是大写的。
如果你想要允许小写,任意数量的空格,使用:
^(([gG][iI][rR] {0,}0[aA]{2})|((([a-pr-uwyzA-PR-UWYZ][a-hk-yA-HK-Y]?[0-9][0-9]?)|(([a-pr-uwyzA-PR-UWYZ][0-9][a-hjkstuwA-HJKSTUW])|([a-pr-uwyzA-PR-UWYZ][a-hk-yA-HK-Y][0-9][abehmnprv-yABEHMNPRV-Y]))) {0,}[0-9][abd-hjlnp-uw-zABD-HJLNP-UW-Z]{2}))$
这并不包括海外领土,只是强制执行格式,而不是不同地区的存在。它基于以下规则:
可接受以下格式:
“秋天” A9 9 zz A99 9 zz AB9 9 zz AB99 9 zz A9C 9 zz AD9E 9 zz
地点:
9可以是任何一位数。 A可以是除Q、V或X之外的任何字母。 B可以是除I、J或Z之外的任何字母。 C可以是除I、L、M、N、O、P、Q、R、V、X、Y或Z之外的任何字母。 D可以是除I、J或Z之外的任何字母。 E可以是A, B, E, H, M, N, P, R, V, W, X或Y中的任意一个。 Z可以是C、I、K、M、O或V之外的任何字母。
最好的祝愿
科林
看看本页的python代码:
http://www.brunningonline.net/simon/blog/archives/001292.html
I've got some postcode parsing to do. The requirement is pretty simple; I have to parse a postcode into an outcode and (optional) incode. The good new is that I don't have to perform any validation - I just have to chop up what I've been provided with in a vaguely intelligent manner. I can't assume much about my import in terms of formatting, i.e. case and embedded spaces. But this isn't the bad news; the bad news is that I have to do it all in RPG. :-( Nevertheless, I threw a little Python function together to clarify my thinking.
我用它来处理邮政编码。
在这个列表中添加一个更实用的正则表达式,允许用户输入一个空字符串:
^$|^(([gG][iI][rR] {0,}0[aA]{2})|((([a-pr-uwyzA-PR-UWYZ][a-hk-yA-HK-Y]?[0-9][0-9]?)|(([a-pr-uwyzA-PR-UWYZ][0-9][a-hjkstuwA-HJKSTUW])|([a-pr-uwyzA-PR-UWYZ][a-hk-yA-HK-Y][0-9][abehmnprv-yABEHMNPRV-Y]))) {0,1}[0-9][abd-hjlnp-uw-zABD-HJLNP-UW-Z]{2}))$
这个正则表达式允许大写字母和小写字母,中间有可选的空格
从软件开发人员的角度来看,这个正则表达式对于地址可能是可选的软件很有用。例如,如果用户不想提供他们的地址详细信息
我们得到了一个说明:
UK postcodes must be in one of the following forms (with one exception, see below): § A9 9AA § A99 9AA § AA9 9AA § AA99 9AA § A9A 9AA § AA9A 9AA where A represents an alphabetic character and 9 represents a numeric character. Additional rules apply to alphabetic characters, as follows: § The character in position 1 may not be Q, V or X § The character in position 2 may not be I, J or Z § The character in position 3 may not be I, L, M, N, O, P, Q, R, V, X, Y or Z § The character in position 4 may not be C, D, F, G, I, J, K, L, O, Q, S, T, U or Z § The characters in the rightmost two positions may not be C, I, K, M, O or V The one exception that does not follow these general rules is the postcode "GIR 0AA", which is a special valid postcode.
我们想出了这个:
/^([A-PR-UWYZ][A-HK-Y0-9](?:[A-HJKS-UW0-9][ABEHMNPRV-Y0-9]?)?\s*[0-9][ABD-HJLNP-UW-Z]{2}|GIR\s*0AA)$/i
但是注意-这允许组之间有任意数量的空格。