topic Re: Labeling: Extract specific letters from string in Python Questions

Labeling: Extract specific letters from string

Frida_questions — Wed, 28 Feb 2024 12:11:47 GMT

Hello!

I could really use some help with a function. I have no experience with phyton and this seems like it could be fairly difficult.

I am trying to label my features. I have a field [trakt] from which i would like to extract the first letter, and if there is a space, I would also want to extract the first letter after that space.

The field [trakt] has names in it, for example it could be "South Sweden", "North Sweden" and "Sweden". If the name is "North Sweden" I would like the script to return "NS", but if the name is "Sweden", the script should return only "S". But in reality I have about 50 different names I would like to do this with (edited).

Is this problem possible to solve?

Re: Labeling: Extract specific letters from string

DanPatterson — Wed, 28 Feb 2024 09:59:27 GMT

verbose so you can follow

python parser,

`a` is your field as an example

code block

a = ["South Sweden", "North Sweden", "Sweden"] def sp(fld): if " " in fld: spl = fld.split(" ") return spl[0][0] + spl[1][0] else: return fld[0] [sp(i) for i in a] ['SS', 'NS', 'S']

calculator expression

sp(!trakt!)

Re: Labeling: Extract specific letters from string

Frida_questions — Wed, 28 Feb 2024 12:07:19 GMT

Oh thank you! But if I have 50 names rather than just 3, is there a way to do this generally, or do I have to specify all 50 ?

Re: Labeling: Extract specific letters from string

DanPatterson — Wed, 28 Feb 2024 12:34:05 GMT

It will do it for all. This is a field calculator function