topic Re: ArcGIS Pro 2.9 - Python Script Failing for Labels in ArcGIS Pro Questions

ArcGIS Pro 2.9 - Python Script Failing for Labels

PeteJordan — Mon, 22 Nov 2021 16:13:47 GMT

Before upgrading to 2.9, I never had an issue with my labeling code at all:

def FindLabel([TrailName],[Width]): str_list = [] if [TrailName] not in (None, "<NULL>","<Null>", "", "0"): str_list.append([TrailName]) if [Width] not in (None, "<NULL>","<Null>", "", "0", " "): width_str = '<ITA>Width = {}\'</ITA>'.format("<ITA>" + [Width] + "</ITA>") str_list.append(width_str) label_str = '\n'.join(str_list) return(label_str)

Now that I switched to 2.9, I'm now getting the following error:

Invalid Expression

Traceback (most recent call last):

File "<expression", line 1, in <module>

NameError: name 'FindLabel' is not defined

I have pasted the exact same code into ArcMap 10.8.1 and it works just fine. So I'm very confused why all of a sudden a labeling script I've used for over a year now just fails in Pro?

Any ideas?

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

JoeBorgione — Mon, 22 Nov 2021 16:30:23 GMT

Did you recently upgrade to Pro 2.9 form an earlier version of Pro or is this a fresh install? Did this work in Pro 2.8.x and earlier?

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

DuncanHornby — Mon, 22 Nov 2021 16:55:16 GMT

I believe the issue lies with this line:

width_str = '<ITA>Width = {}\'</ITA>'.format("<ITA>" + [Width] + "</ITA>")

Replace it with this:

width_str ="<ITA>Width = " + [Width] + "</ITA>"

I can only guess some changes behind the scene have occurred, may be with the parser or version of python?

I think the writing is on the wall with python as they are pushing Arcade as the default, cross platform labelling language, so it might be worth your while investing some time learning this new scripting language.

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

PeteJordan — Mon, 22 Nov 2021 17:47:07 GMT

@JoeBorgione: Yes I was on 2.8.3 before and the label script has worked just fine in all previous Pro versions for the past year or more. In fact I used the script the week before without any issues.

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

PeteJordan — Mon, 22 Nov 2021 17:49:23 GMT

@DuncanHornby I tried your suggestion, but, no luck and I continue to get the same issue that it can't define the "FindLabel" name that I defined in the first line.

Just seems really strange. Yeah I think it might take me way too long to learn Arcade, I'm not the quickest at learning languages at all...

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

JoeBorgione — Mon, 22 Nov 2021 18:57:05 GMT

Since it worked in earlier versions of Pro, this sounds like a new undocumented feature (aka bug) at 2.9. In the old days of ArcInfo as well as ArcGIS the unwritten rule was never update to a new version that ends in dot zero. I relearned this lesson at 2.8.0 and rolled back to 2.7.4. Once 2.8.2 came out I updated to that. If this was happening to me, I'd roll back to the last version your script worked.

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

PeteJordan — Mon, 22 Nov 2021 20:15:58 GMT

@JoeBorgione: Due to another unrelated bug that prevents me from properly working in 2.9, I actually did just that and uninstalled 2.9 and reinstalled 2.8 and the 3 service packs and now that I'm back in 2.8.3, the code works fine. So yes, it seems to be yet another bug I've found in 2.9.

Bad thing is I'm unable to even submit a bug report due to the website having issues for the past few days (I did get ESRI support on the phone and they're looking into the issue now), but it will be another bug I'll have to remember to submit with 2.9 then...

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

JoeBorgione — Mon, 22 Nov 2021 22:46:10 GMT

Let ESRI log the bug; it's their problem...

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

PeteJordan — Mon, 22 Nov 2021 22:50:48 GMT

Hopefully they see it then, but at least I know it's a version issue then and one of 2 bug issues that is enough for me not to continue using 2.9...

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

DuncanHornby — Tue, 23 Nov 2021 11:17:59 GMT

Pete,

Not sure why you are still getting an error as the code works for me, I suspect you don't have the correct indentation?

I spoofed up your fields in a dataset I have and as you can see it works:

The code being:

def FindLabel([TrailName],[Width]): str_list = [] if [TrailName] not in (None, "<NULL>","<Null>", "", "0"): str_list.append([TrailName]) if [Width] not in (None, "<NULL>","<Null>", "", "0", " "): width_str ="<ITA>Width = " + [Width] + "</ITA>" str_list.append(width_str) label_str = '\n'.join(str_list) return(label_str)

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

PeteJordan — Tue, 23 Nov 2021 13:31:56 GMT

Yeah I have no idea. I've always just copied the code and it's always worked until 2.9. As I rolled back to 2.8.3 due to other issues I've found in 2.9, the same code works as it should in 2.8. I don't get it at all. I had even copied the code directly from 2.9 and tested it in ArcMap and it worked there as well. So I have no idea other than some freak glitch with the 2.9 install or something?

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

DuncanHornby — Tue, 23 Nov 2021 14:01:43 GMT

Yeah I've had a bit of a nightmare with 2.9. Not a single tool would run! I had to uninstall everything, kill off some user directories and then reinstall from an ISO I had downloaded. But now fingers crossed it does appear to be stable and my processing is chugging alone fine...

I got quite excited about the new toolbox format until this... 😉

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

PeteJordan — Tue, 23 Nov 2021 14:27:56 GMT

Good to know then it's not just me who has had issues. I can't even get my keybinds to save anymore and for editing in Pro, that's a nightmare without that ability. I might just way for the next 2.9 patch then and hopefully that fixes some things, but good to know it wasn't just me that's having 2.9 issues at all...

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

JoeBorgione — Tue, 23 Nov 2021 16:15:19 GMT

Hey @KoryKramer ; you might want to read this post....

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

WendyHarrison — Wed, 24 Nov 2021 18:13:27 GMT

Thanks for bringing this to our attention. We're working on a fix for it. Until then you can use the workaround below.

swapping the quotes and removing the escape character can be used as a workaround

def FindLabel([TrailName],[Width]):
str_list = []
if [TrailName] not in (None, "<NULL>","<Null>", "", "0"):
str_list.append([TrailName])
if [Width] not in (None, "<NULL>","<Null>", "", "0", " "):
width_str = "<ITA>Width = {}'</ITA>".format("<ITA>" + [Width] + "</ITA>")
str_list.append(width_str)
label_str = '\n'.join(str_list)
return(label_str)

This was the original part that was broken

'<ITA>Width = {}\'</ITA>'

This is the updated part

"<ITA>Width = {}'</ITA>"

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

PeteJordan — Thu, 02 Dec 2021 13:50:51 GMT

Thanks Wendy for that workaround. I just feel I have a lot of scripts and taking the time doing this to every one of them might not be worth it. I think I'll just skip over 2.9 until this (and another bug I have that prevents me from using 2.9) are resolved...

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

WendyHarrison — Fri, 03 Dec 2021 18:26:31 GMT

the number for this issue is BUG-000144967. You can track it through support services.

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

WendyHarrison — Tue, 21 Dec 2021 22:21:18 GMT

@PeteJordan
here's the second part you requested

def FindLabel([TrailName],[Width]):

str_list = []

if [TrailName] not in (None, "<NULL>","<Null>", "", "0"):

str_list.append([TrailName])

if [Width] not in (None, "<NULL>","<Null>", "", "0", " "):

width_str = "<FNT size = '20'><ITA>Width = {}'</ITA>".format("<ITA>" + [Width] + "</ITA>")+"</FNT>"

str_list.append(width_str)

label_str = '\n'.join(str_list)

return(label_str)

resulting in a label like this

Re: ArcGIS Pro 2.9 - Python Script Failing for Labels

PeteJordan — Wed, 22 Dec 2021 13:39:21 GMT

@WendyHarrison: Yes I figured it out and deleted the message, but guess you must have seen it before I was able to remove the post. It was the single quote that I had accidentally gotten rid of when I should have kept that one part and only changed the other single quotes was my issue...