ArcPro Calculate Field with Python Error

soosterhouse

Hello,

I am trying to calculate a field with a constant text string and sequential numbering with leading zeros. I have used this expression and code block previously and been successful but now I am getting an error that it cannot find a function that matches the text string. Obviously, there would not be a function matching my text string, but I am not sure why it is not being recognized as a string with the ' '.

Any help would be appreciated. Thanks!

Expression: 'ARC-DOOR-STN-' + "{:0>5}".format(SequentialNumber())

Code Block:

# Calculates a sequential number
# More calculator examples at esriurl.com/CalculatorExamples
rec=0
def SequentialNumber():
global rec
pStart = 669
pInterval = 1
if (rec == 0):
rec = pStart
else:
rec = rec + pInterval
return rec

#change pstart to last ID number#

Nick_Creedon

I recommend just adding prefix above the sequential code and add it in the return string. This keeps it simple, and I have used it on some hefty datasets. Check out below: you will see I was creating ID's for manholes and their district. 

 

prefix= "6-MH-"
rec=0
def SequentialNumber():
    global rec
    pStart = 1
    pInterval = 1
    if (rec == 0):
        rec = pStart
    else:
        rec = rec + pInterval
    return prefix + str(rec)