使用正则表达式匹配确切的位数和单词数-Python27

Question

I have this string.

P O BOX 32370, CA 92263

And this Regex \\w{2} \\d{5}

But it matches both texts in bold. "POB OX 32370 , CA 92263 "

Actually I want to extract State, and Zip code.

I want to grab text starting and a space, then exact 2 alphabets, then one space, then exact 5 digits.

Answer 1

You can add word boundary \\b to make sure the pattern doesn't have leading or trailing word characters (alphanumeric and underscore):

import re

re.findall(r"\b\w{2} \d{5}\b", "P O BOX 32370, CA 92263")
#['CA 92263']

Answer 2

to grab text starting and space, then exact 2 alphabets , then one space, then exact 5 digits.

Unfortunately, this pattern \\b\\w{2} \\d{5}\\b will also find a match in such strings as "PO BOX 32370, 2A 92263" giving the result which doesn't fit your requirement. \\w - matches all alpha numeric characters.
To extract State , and Zip code use the following approach with re.search() and match.groupdict() (gets all the named subgroups of the match) methods:

s = 'P O BOX 32370, CA 92263'
m = re.search(r'\b(?P<state>[a-zA-Z]{2}) (?P<zip_code>\d{5})\b', s)
result = m.groupdict() if m else ''

print(result)

The output:

{'zip_code': '92263', 'state': 'CA'}