Regex for all kind of number variations

Question

I am using python to parse some strings that contain numbers and I want to find a regex that will extract all kind of scenarios:

.2345 0.934 12.3 11.0

Tried something like:

((\-|\+)?[0-9]+(\.[0-9]+)?)

But it seems like cases with .number are not covered.

What would you want to ultimately do with this? Just check if a string is a number or not? — Mureinik, Dec 27 '16 at 20:37
Please show us actual code you've written, not just the regex. Show us what was found and what wasn't found but should have been. — Andy Lester, Dec 27 '16 at 20:37
@AR7. That does not apply here. OP is clearly asking to parse floats, while the other question is clearly int-only — Mad Physicist, Dec 27 '16 at 20:39
@BillBell. It's when a user asks "How do I do X" when they are really faced with problem Y and are on the wrong track. http://meta.stackexchange.com/q/66377/346663. Some of the links are interesting. — Mad Physicist, Dec 27 '16 at 20:42

Hardik · Accepted Answer · 2016-12-27T20:50:32.970

-1

Your RegEx is correct, but you want to parse numbers which starts with . also, so you can add \. along with \-|\+ as follow: ((\-|\+)?(\.)?[0-9]+(\.[0-9]+)?)

Note: It will match .1.1

edited Dec 27 '16 at 20:50

answered Dec 27 '16 at 20:41

Hardik

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Wouldn't match `12.` – Mad Physicist Dec 27 '16 at 20:44
Would match `.34.44` – Mad Physicist Dec 27 '16 at 20:45
I think in '12.' it should match only 12 and ignore .(dot), that's what my RegEx is doing. – Hardik Dec 27 '16 at 20:52

Regex for all kind of number variations

1 Answers1