topic Re: Error migrating python label expression from Arcmap to Arc Pro in ArcGIS Pro Questions

Error migrating python label expression from Arcmap to Arc Pro

JoanHickey — Wed, 27 Oct 2021 17:26:39 GMT

I have a python label expression that works in arcmap, but when I try it in ArcPro, I get an AttributeError: "NoneType' object has not attribute 'strip'. I think this might happen because there are null values in my data (just a guess). Here is the expression:

def FindLabel ( [PAD_addr],[UnitsRes],[NumBldgs]):
S =[PAD_addr].strip()
i = S.find('(')
nres = long([UnitsRes])
nbldg = long([NumBldgs])
if i == -1:
tmp = S.replace('::','\n')
elif i > 0:
tmp = S[0:i]
if nbldg > 1:
tmp2 = ' on lot)'
else:
tmp2 = ')'
if nres == 0:
return tmp + '\n(no res units)'
elif nres == 1:
return tmp + '\n(' + str(nres) + ' res unit' + tmp2
else:
return tmp + '\n(' + str(nres) + ' res units' + tmp2

Any help would be appreciated.

Re: Error migrating python label expression from Arcmap to Arc Pro

JoeBorgione — Wed, 27 Oct 2021 19:19:55 GMT

Trap for null values and use a pass:

if <!field!> is null: pass else: #do the rest of the mojo

(not tested...)

Re: Error migrating python label expression from Arcmap to Arc Pro

DanPatterson — Wed, 27 Oct 2021 22:41:39 GMT

or query your data for null values, switch the selection, then use your function

Code formatting ... the Community Version - Esri Community

to make code easier to read

Re: Error migrating python label expression from Arcmap to Arc Pro

JoeBorgione — Thu, 28 Oct 2021 14:24:38 GMT

@JoanHickey - this is a better solution for you.

Re: Error migrating python label expression from Arcmap to Arc Pro

JoanHickey — Thu, 28 Oct 2021 15:30:11 GMT

It was actually

if <!field!> == None:
pass

Thanks for the help.

Happy retirement!