- #Regex for number with three decimal places verification
- #Regex for number with three decimal places code
Yield (mat.group(), ''.join(mat.groups('')), mat.groups(''))ĭef dzs_numbs2(x,regx = regx): # ds = detect and zeros-shave Yield ('No match,', 'No catched string,', 'No groups.')
#Regex for number with three decimal places code
I apologize for this code written in Python, but regexes are trans-langage and I think everybody will be capable of undertsanding the reex's pattern import re I wouldn't be surprised if errors or unwanted matchings or unmatchings will remain for certain cases of number strings then I'd like to know these cases to understand and correct the deficiency. There are two functions, according if one wants the numbers '.1245' to be transformed in '0.1245' or not. Here after is a code demonstrating how my regex works. It won't be dificult to correct, I presume I think that the managing of commas should be improved, because it seems to me that there are only 2 digits between commas in Indian numbering. But in ',111' the string '111' matches because the preceding comma is considered a comma not being in a number but a comma of sentence.
#Regex for number with three decimal places verification
I put some verification in the pattern so that some particular cases will not match, for exemple '12.57' won't match.
![regex for number with three decimal places regex for number with three decimal places](https://miro.medium.com/max/1400/1*7AAu-Pba_Ds6pSuFlhm6SQ.png)
If an exponent is equal to zero, the number is modified so that there is no more exponent. The regex is built in order that it can detect the numbers expressed in scientific notation 2E10 or even 5,22,454.12E-00.0478, removing unnecessary zeros in the two parts of such numbers too. If points are obscure, and if anybody may come to be interested enough, please, ask me. Now, after a long session of work on this regex, I have a sort of weight in the brain, so I'm not fresh enough to give a lot of explanation. I would be interested to know the points that are in excess or in lack in my regex, and to correct it to make it more suitable for you. I don't know if the result fits exactly to the need expressed by Michael Prescott. I've been carried away with my enthusiasm and my liking of regexes. I have taken the regex's pattern I had writen in that previous problem I worked on and I improved it in order that it can treat the numbers with commas as an answer for this problem. In the continuity of that problem, I find this one interesting because it widens the problem to numbers comprising commas.
![regex for number with three decimal places regex for number with three decimal places](https://docs.tibco.com/pub/amx-bpm/3.1.0/doc/html/bpmhelp/GUID-C4CAAB43-D43F-4ED9-B837-85978DE83E94-display.jpg)
Some days ago, I worked on the problem of removing trailing zeros from the string of a number.
![regex for number with three decimal places regex for number with three decimal places](https://i.stack.imgur.com/GpLSM.png)
Or you could do some basic processing, then use your language's built-in number parsing functions. Instead of trying to do everything in one step, you could do it in two: a regex to catch anything that might be a number, then another one to weed out whatever isn't a number. I enjoyed the challenge, but you should consider whether you really want to use this in a production environment. Obviously, this is a massive, complicated, nigh-unreadable regex. The numbers you're looking for will be in capture group 1. Basic patternĬonsidering the examples you've given, here's a simple regex that allows pretty much any integer or decimal in 0000 format and blocks everything else: ^\d*\.?\d+$ If that's not an option for you, keep reading. What you should really do is split the whole thing on whitespace, then run two or three smaller regexes on the results. A single regex for two different number formats is hard to maintain even when they aren't embedded in other text. is a wrong answer.įirst of all, if you don't need to do this all in one regex, don't. IMHO anything that fails to pull 1,234.- and only those numbers-out of abc22 1,234.56 9.9.9. That's simple enough to fix, even if the numbers are embedded in other text.
![regex for number with three decimal places regex for number with three decimal places](https://miro.medium.com/max/684/1*Q70da0n7q90b5x4d6Df8-w.png)
This is a very common task, but all the answers I see here so far will accept inputs that don't match your number format, such as ,111, 9,9,9, or even. Now that that's out of the way, most of the following is meant as commentary on how complex regex can get if you try to be clever with it, and why you should seek alternatives. #Commas optional as long as they're consistent #For numbers embedded in sentences, see discussion below EDIT: Since this has gotten a lot of views, let me start by giving everybody what they Googled for: #ALL THESE REQUIRE THE WHOLE STRING TO BE A NUMBER