topic Newbie: Why wouldn't this simple code work? in Python Questions

Newbie: Why wouldn't this simple code work?

PeterPeng — Tue, 10 Apr 2012 18:10:42 GMT

Purpose:
I have 1 field in a large table with numbers in mm, want to show in m. Want to use python to multiply by 1000. Want to use the Python Field Calculator for this.

Code:

def func( height ):  return (height*1000)

HEIGHT_MM= func(!HEIGHT_MM)

Result:
the code succeeds (no syntax errors), but nothing happens to the numbers in my field!

Re: Newbie: Why wouldn't this simple code work?

DarrenWiens2 — Tue, 10 Apr 2012 18:14:11 GMT

You need another exclamation mark around the field name. I'm a little bit surprised that it ran at all. It may be interpretting the one exclamation as "if HEIGHT_MM does not exist".

HEIGHT_MM= func(!HEIGHT_MM!)

Re: Newbie: Why wouldn't this simple code work?

BruceNielsen — Tue, 10 Apr 2012 18:14:12 GMT

It should be:

HEIGHT_MM= func(!HEIGHT_MM!)

You're missing the trailing exclamation.