正则表达式按特定值拆分字符串

Question

Trying to split a string by specific characters and values with a regex expression.

I have the following string for example:

abc.def.ghi:wxyz_1234

I would like to get both ' wxyz ' and ' 1234 '.

ie the string between ':' and '_' and the string after '_'

Cheers!

Answer 1

Method 1

Maybe,

([^\s:_]+)_(\S+)

might work OK.

RegEx Demo 1

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Method 2

With lookbehind, to create a left boundary for pre-underscore string:

(?<=:)([^_]+)_(.+)

RegEx Demo 2

Test

import re

string = '''
abc.def.ghi:wxyz_1234
abc.def.ghi:abcd_78910
abc.def.ghi: foo_baz123
'''

expression = r'([^\s:_]+)_(\S+)'

for i in re.findall(expression, string):
    print(i[0])
    print(i[1])

Output

wxyz
1234
abcd
78910
foo
baz123

---

If you wish to simplify/modify/explore the expression, it's been explained on the top right panel of regex101.com . If you'd like, you can also watch in this link , how it would match against some sample inputs.

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RegEx Circuit

jex.im visualizes regular expressions:

Answer 2

string str = "abc.def.ghi:wxyz_1234";    
Regex rx = new Regex(":(.*)_(.*)");    
Match match = rx.Match(str);    
string first =match.Groups[1].Value;    
string second= match.Groups[2].Value;

Answer 3

I managed to create the following Case A - (?<=:)(.+)(?=_) Case B - (?<=_).*

Guess the options are endless...

Thanks for your assistance!