topic Re: Why does this Python label expression fail to add a new line? in ArcGIS Pro Questions

Why does this Python label expression fail to add a new line?

GerryGabrisch — Mon, 07 Jul 2025 22:36:03 GMT

This Python label properties expression ought to add a new line but it fails to do so. Any clues are appreciated.

[Contour] + ' ft NAVD88' + '\n' + str(float([Contour]) + 0.79) + ' ft MLLW'

Re: Why does this Python label expression fail to add a new line?

DanPatterson — Mon, 07 Jul 2025 23:54:01 GMT

from

Specify text for labels—ArcGIS Pro | Documentation

A label expression can be either a simple single-line expression or a more complex expression spanning multiple lines of code and using the parser's programming logic. Arcade enables complex expressions by default. When using Python, VBScript, or JScript, check the Advanced check box and wrap the code in a function to enable multiline expressions.

So you need to write a "def"

Re: Why does this Python label expression fail to add a new line?

KenBuja — Tue, 08 Jul 2025 13:18:49 GMT

I think you're confusing multi-line labels with multi-line expressions. This single-line expression works properly in my testing.

Re: Why does this Python label expression fail to add a new line?

GerryGabrisch — Tue, 08 Jul 2025 21:43:22 GMT

Another bug?! This software is maddning. I am on v3.4. How about you KenBuja?

Re: Why does this Python label expression fail to add a new line?

HansRasmussen — Tue, 08 Jul 2025 21:54:38 GMT

You didn't have "Remove extra line breaks" checked maybe? I tend to use '\r\n'

Re: Why does this Python label expression fail to add a new line?

GerryGabrisch — Tue, 08 Jul 2025 23:13:13 GMT

I did try '\r\n' to no avail before posting. Remove extra line breaks is unchecked.

Re: Why does this Python label expression fail to add a new line?

KenBuja — Wed, 09 Jul 2025 12:21:36 GMT

This was on 3.5.2

Re: Why does this Python label expression fail to add a new line?

JoshuaBixby — Wed, 09 Jul 2025 18:13:24 GMT

Taking a quick look through ArcGIS Pro 3.4 Issues Addressed and ArcGIS Pro 3.5 Issues Addressed, nothing in Pro 3.4 patches or Pro 3.5 seems to involve a labeling defect that would cause this difference between versions.