IF STATEMENT Calculate Field Help ArcPro

[ABM2021]

Hello everyone. I am new to coding and need some help using the calculate field option.

I have one field (!ARA!) and another field (!Class!). When area is a certain size, I would like to change the attribution of !Class! to be either 25, 50, 100, or 200. 

Should the field name be !Class!?

Expression type : Python 3

What should the expression be?

Is this the correct code block?

def Reclass(!ARA!):
if !ARA! is <= 1000:
return 25
elif !ARA! >= 1000:
return 50
elif !ARA! >= 2000:
return 100
elif !ARA! >= 5000:
return 150

I keep getting syntax errors. I will appreciate any help! Thank you in advance.

[JoeBorgione]

def Reclass(!ARA!):
     if !ARA! is <= 1000:
         return 25
     elif !ARA! >= 1000:
        return 50
     elif !ARA! >= 2000:
        return 100
     elif !ARA! >= 5000:
        return 150

We can't tell if you've properly indented your def() as well as your if/elif so here ^ is what it should look.  That said I think your error is passing !ARA!.  Instead of passing that directly, try this approach:

def Reclass(inValue):
    if inValue is <= 1000:
        return 25
    elif inValue >= 1000:
        return 50
    elif inValue >= 2000:
        return 100
    elif inValue >= 5000:
        return 150

In your field calculator, enter :

reclass(!ARA!)

in the upper window.

Is !ARA! numeric?  If not that will be an issue as well.

Your logic is a little bit flawed as well: if !ARA! == 1,000 what  value do you really want?

[KenBuja · Accepted solution]

The code won't work as expected. The If statement will be satisfied with the first condition that evaluated to true, so inValue = 5000 would return 50. You want the logic to be like this instead.

def Reclass(inValue):
  if inValue is <= 1000:
    return 25
  elif inValue < 2000:
    return 50
  elif inValue < 5000:
    return 100
  else:
    return 150