topic Re: Python problem 'Calculate Field' in Geoprocessing Questions

Python problem 'Calculate Field'

VeronicaMartin_Martin — Wed, 08 Aug 2012 09:14:35 GMT

Hi all,
I'm just starting with Python and I'm a bit stuck... so sorry if the question is very basic, but I cannot find it anywhere. I'm working with ArcGis 9.3

I am developing a model builder, in one step I have to calculate a field (field3) based on two other different fields, lets say
[FIELD_1= a, b, c, d???] and [FIELD_2= 1, 2, 3..].

From here no problem, the point is that FIELD_3 takes different values depending on Field_1 value.
For one unique value in FIELD_1 I have the following code working properly

[ATTACH=CONFIG]16760[/ATTACH]
def Reclass(FIELD_2):
if (FIELD_2 < 92):
    return 0
elif (FIELD_2 >= 92 and FIELD_2 < 93.5):
    return 1
elif (FIELD_2 >= 93.5):
    return 2

The problem is that I don???t know how to add that if ???FIELD_1== 1 or 2 or 4??? do the calculation above, but if FIELD_1 == 3, 5, 7 do a different one.

Any help would be really helpful
Thank you very much in advance!!

Veronica.

Re: Python problem 'Calculate Field'

JakeSkinner — Wed, 08 Aug 2012 12:09:17 GMT

Hi Veronica,

You could do something like the following:

def Reclass(FIELD_1, FIELD_2):   if FIELD_1 == 1 or FIELD_1 == 2 or FIELD_1 == 4:     if (FIELD_2 < 92):       return 0     elif (FIELD_2 >= 92 and FIELD_2 < 93.5):       return 1     elif (FIELD_2 >= 93.5):       return 2   elif FIELD_1 == 3 or FIELD_1 == 5 or FIELD_1 = 7:     <other code>

Re: Python problem 'Calculate Field'

VeronicaMartin_Martin — Wed, 08 Aug 2012 15:14:14 GMT

wow!!! that works perfectly!!!!!

Thank you veeery much!

Re: Python problem 'Calculate Field'

DanPatterson_Retired — Wed, 08 Aug 2012 15:16:55 GMT