Unable to create regex pattern

Question

I have a string

81.5r3

I need to create a regex pattern, So that I should get a exact list as mentioned below

['81.5', 'r', '3']

The pattern should be float, char, int

Is there any way to achieve this?

You need to be more specific about the patterns of data you want to match. Otherwise this question is too broad. As currently written, someone could answer with (81\.5)(r)(3) — Nick
– Nick, Commented Jan 7, 2021 at 4:07
@Nick I have mentioned how I need the output. What else should I mention? — Smruti Sahoo
– Smruti Sahoo, Commented Jan 7, 2021 at 4:11
"the patterns of data you want to match". Are they all a floating point number, a letter, and a digit? Or is the pattern different? — Nick
– Nick, Commented Jan 7, 2021 at 4:12

Jiří Baum · Accepted Answer · 2021-01-07 04:24:33Z

2

Try something like regex101.com for quick experimentation?

For a "float, char, int" sequence, it'll be something like:

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

You can refine it if you want to do things like forbid leading/trailing zeros:

(-?[1-9][0-9]*(?:\.[0-9]*[1-9])?)(.)(-?[1-9][0-9]*)

You may also need to refine it if you need to support exponential notation (1.2e3) or NaN/Inf values for the float part.

answered Jan 7, 2021 at 4:24

Jiří Baum

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Thuấn Đào Minh · Accepted Answer · 2021-01-07 04:40:04Z

2

(\d+[.]\d)([a-z])(\d)

I made a simple regex. I think that's enough for you to upgrade it, good luck, and happy new year.

Please check

https://regex101.com/r/kFYzag/5

Please use regex101 to try your idea.

Image result

answered Jan 7, 2021 at 4:40

Thuấn Đào Minh

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python_user · Accepted Answer · 2021-01-07 04:21:41Z

1

 re.split(r"([a-z])", '81.5r3')

You can use re.split using a capture group to get what you want.

The output would be ['81.5', 'r', '3']

answered Jan 7, 2021 at 4:21

python_user

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python_user Over a year ago

You can mark this as accepted if it helped you

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