Regex specific dash pattern (Python)

Question

I am trying to make a regex that recognizes a specific dash-pattern in a string.

String example: 1L34-1A345-12B45-1a or 01aB-5432A-0014z-20

Explained: four character - five characters - five characters - two characters

The string contains numbers, upper- and lowercase characters.

I came up with the following pattern and it does the trick, but I think it could be expressed a bit simpler.

pattern = '[A-Za-z0-9][A-Za-z0-9][A-Za-z0-9][A-Za-z0-9]-[A-Za-z0-9][A-Za-z0-9][A-Za-z0-9][A-Za-z0-9][A-Za-z0-9]-[A-Za-z0-9][A-Za-z0-9][A-Za-z0-9][A-Za-z0-9][A-Za-z0-9]-[A-Za-z0-9][A-Za-z0-9]'

Any ideas?

Stefan · Accepted Answer · 2020-08-29 06:52:24Z

1

Indeed, you can simplify your regex to e.g.

pattern = r'[A-Za-z0-9]{4}-[A-Za-z0-9]{5}-[A-Za-z0-9]{5}-[A-Za-z0-9]{2}'

answered Aug 29, 2020 at 6:52

Stefan

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2 Comments

deadshot Over a year ago

you can even simplify store this [A-Za-z0-9] in a variable and use varible to create regex

RedHawkDK Over a year ago

@Stefan Super! Just what I was looking for. And deadshot, good idea with the variable! Have a nice day! Thanks

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