Basic Python Reclass question in Field Calculator

Question

I'm trying to reclass values in field calculator using Python.

I want any value >= '5' to remain the same (return same value). Anything else to be = '0'.

Yes, DIST_EDGE are numbers.

I'm getting an invalid syntax error in Line 1 (see below)

Here's what I came up with (new script following comments):

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Error Message:

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Is the data type for DIST_EDGE string or numeric? String values are accessed with quotes, numbers are not. — phloem, Jan 7, 2015 at 17:06
Once you call the function Reclass(!POINTS_Adelard.DIST_EDGE!), the passed value is stored in a variable, no '!'. I've updated my answer below. — phloem, Jan 7, 2015 at 18:37

phloem · Accepted Answer · 2015-01-07 18:35:38Z

4

Assuming the data type for DIST_EDGE is numeric, the function should be (note, no quotes):

def Reclass(dist):
    if dist >= 5:
        return dist
    else:
        return 0

However, if DIST_EDGE is a string data type, you must cast it to a number before making your comparison:

def Reclass(dist):
    if int(dist) >= 5:
        return dist
    else:
        return '0'

answered Jan 7, 2015 at 17:10

phloem

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3

These functions will work. The actual problem with the OP's code is that his function is using !POINTS_Adelard.DIST_EDGE! as a parameter name, which is of course invalid Python syntax. Replacing those references in the function (but not the final function call) with dist (as in @phloem's examples) will resolve this.
– nmpeterson
Jan 7, 2015 at 18:57

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