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Reclass python script not working

JenniferDick

Hi,

I'm trying to reclass a vector field that has values from 1 to 7. I would like to reclass these values to 1's & 2's. For example:

if the value is 1 reclass it to 2
if the value is 2 reclass it to 2
if the value is 3 reclass it to 1

and so on.

Here is my script, but it is not working...any thoughts?

def Reclass( !Value! 😞
if ( !Value! = 1):
    return 2
if ( !Value! = 2):
    return 2
if ( !Value! = 3):
    return1
if ( !Value! = 4):
    return 1
if ( !Value! = 5):
    return 1
if ( !Value! = 6):
    return 1
if ( !Value! = 7):
    return 1

reclass( !Value! )

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Accepted answers

BruceBacia

this worked for me. You might want to double check that you are selecting "Python" at the top. I forgot several times while
testing 🙂

def Reclass(n):     valueDict = {1 : 2, 2 : 2, 3 : 1, 4 : 1, 5 : 1, 6 : 1, 7 : 1}      return valueDict   Weight =  Reclass(!Value!)

All comments

DanielAmrine

What about going from text to float?

I am trying to do reclass based on a text value to calcualte a buffer distance....

def Reclass(!DRILLTYPE!)
if DRILLTYPE = U
    return 1177.5
elif DRILLTYPE = V
    return 744.9
elif DRILLTYPE = D
    return 744.9
elif DRILLTYPE = H
    return 1053.4

This is what i put into the codeblock but it keeps giving me the parse syntax error mentioned above. Do I need to reclass the tex into numbers first?

Thanks!
Dan

JenniferDick

Thanks for all the comments. I have the calculation working now. It was the Float and Integer fields causing the problem.

BruceBacia

This worked going integer to integer. It may be the float vs. integer problem that's hanging it up ?

BruceBacia

this worked for me. You might want to double check that you are selecting "Python" at the top. I forgot several times while
testing 🙂

def Reclass(n):     valueDict = {1 : 2, 2 : 2, 3 : 1, 4 : 1, 5 : 1, 6 : 1, 7 : 1}      return valueDict   Weight =  Reclass(!Value!)

JenniferDick

The Value field is a Float and the Weight field is integer

BruceBacia

Are these fields both integer?

JenniferDick

[ATTACH=CONFIG]16950[/ATTACH]Still receive a generic error...

I've attached a screen shot of the field calculator. Note that the Weight field is the column I would like the changes to be placed and the Value field is what I want to reclassify.

I appreciate your time!

Code.jpg

SolomonPulapkura

Try

def Reclass(n):
if ( n == 1):
return 2
....

Reclass( !Value! )

JenniferDick

Thank you for your input...

I've tried both options and still no success.

Here is the error message I receive:

Failed to execute. Parameters are not valid
ERROR 000989: Python syntax error: Parsing error (type 'exceptions.SyntaxError'>: invalid syntax (line 1)
Failed to execute (CalculateField)

JenniferDick

try double equals sign to compare
if ( !Value! == 1):
also your function call should be Reclass(!Value!)

Is Value the name of the field?

Yes, Value is the name of the field

BruceBacia

Using a dictionary, you can avoid all of the if/thens

def Reclass( !Value! ):
    valueDict = {1 : 2, 2 : 2,
                     3 : 1, 4: 1,
                     5 : 1, 6 : 1,
                     7: 1} 
    !VALUE! = valueDict[!VALUE!]

SolomonPulapkura

try double equals sign to compare

if ( !Value! == 1):

also your function call should be Reclass(!Value!)

Is Value the name of the field?

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