calculate feild using phyton if function

[matu89]

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]

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]

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

image is attached here :

 thank u 

[DanPatterson · Accepted solution]

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

goes under Status =  line

not in the code block

some background

Fundamentals of field calculations—ArcGIS Pro | Documentation

[JayantaPoddar]

Another alternative.

Expression:

Slope(!Height_Delta!)

Code Block:

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

[DanPatterson]

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