CODEWITHSUNDEEP
pythonregex
Mayur
Mayur

Reputation: 3097

What should be the regex for strings?

I'm trying to write a Regex for strings -

c190_12_1-10
c129
abc_1-90

to separate to -

['c190_12_', '1', '10']
['c', '129']
['abc_', '1', '90']

So far I've came up with (\D+)(\d+)-?(\d+)?

But, it doesn't work for all combinations. What I am missing here?

Upvotes: 1

Views: 77

Answers (2)

Casimir et Hippolyte
Casimir et Hippolyte

Reputation: 89639

You can use this:

items = ['c190_12_1-10', 'c129', 'abc_1-90']
reg = re.compile(r'^(.+?)(\d+)(?:-(\d+))?$')

for item in items:
   m = reg.match(item)
   print m.groups()

Upvotes: 1

brandonscript
brandonscript

Reputation: 73044

Not sure what exactly you do and don't want to match, but this might work for you:

(?:(\w+)(\d+)-|([a-z]+))(\d+)$

http://regex101.com/r/uA3eZ4

The secret here was working backwards form the end, where it always seems to be the same condition. Then using the conditionals and the non-capture group, you end up with the result you've shown.

Upvotes: 0

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