Need help with field calculator.

[EGardner7]

I am trying to use field calculator to move numbers to the front of a value. For example, Apple Dr. 245 to 245 Apple Dr. I have tried a bunch of different python scripts that are AI generated but I can't get it to work. Does anyone know why I could be having issues with this? Here is one script I tried for example: 

def move_numbers_to_front(value):
words = value.split()
if len(words) > 1 and words[-1].isnumeric():
return f"{words[-1]} {' '.join(words[:-1])}"
return value

# Usage: move_numbers_to_front(!CableName!)

[DanPatterson]

indentation perhaps

a = "Apple Dr. 245"

def move_numbers_to_front(value):
    words = value.split()
    if len(words) > 1 and words[-1].isnumeric():
        return f"{words[-1]} {' '.join(words[:-1])}"
    return value
    

move_numbers_to_front(a)
'245 Apple Dr.'

[EGardner7]

Unfortunately that didn't work. Thank you though!

[JoshuaBixby]

Comments like "that didn't work" aren't helpful.  If there was an error, what exactly was the error, and provide a traceback if one exists.  If there was no error but the results are unexpected, state what you expected and what you got.

[DanPatterson]

Then you might want to provide the error message.  Perhaps, you have some null values in the field or other issues with the contents of the field

[EGardner7]

Yes there are null values in the field. How do I get it to ignore those? The error message is: There was a failure during processing, check the Geoprocessing Results window for details.

[DanPatterson]

perhaps

a = None
def move_numbers_to_front(value):
    if value is None:
        return
    words = value.split()
    if len(words) > 1 and words[-1].isnumeric():
        return f"{words[-1]} {' '.join(words[:-1])}"
    return value
    

print(move_numbers_to_front(a))
None

[DanPatterson]

did it work? or were there other issues?