topic calculate feild using phyton if function in ArcGIS Pro Questions

calculate feild using phyton if function

matu89 — Mon, 28 Jun 2021 16:00:11 GMT

hello, i want to calculate feild using phyton if function to do the following :

if Height_Delta is greater than 0 write in the status cell " Uprise"

if Height_Delta is less than 0 write in the status cell "Downrise"

image is attached

can anyone can help with the code ?

thanks.

DanPatterson — Mon, 28 Jun 2021 16:30:26 GMT

Height_Delta = 5 # ---- example value ["Down_rise", "Up_rise"][Height_Delta > 0] 'Up_rise'

Remember to put ! marks around Height_Delta ( !Height_Delta! ) since it is a python field calculator expression

matu89 — Mon, 28 Jun 2021 17:05:41 GMT

can u tell where to write each line of the code in the feild calculator window ?

image is attached here :

thank u

DanPatterson — Mon, 28 Jun 2021 19:12:50 GMT

["Down_rise", "Up_rise"][!Height_Delta! > 0]

goes under Status = line

not in the code block

some background

JayantaPoddar — Mon, 28 Jun 2021 19:29:17 GMT

Another alternative.

Expression:

Slope(!Height_Delta!)

Code Block:

def Slope(HT): if HT< 0: return 'Downrise' else: return 'Uprise'

DanPatterson — Mon, 28 Jun 2021 22:08:51 GMT

expression

code_block(!Height_Delta!)

code block

def code_block(fld) """code block isn't really needed""" return ["Down_rise", "Up_rise"][fld > 0]

but as you can see it really isn't needed