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I think this may be what you are after - the syntax is not one that I try to remember. I simply ran the Calculate Field tool once interactively using the Expression and Code Block from your questio …

I think the cause of this, and the reason you are also having trouble formatting this correctly in the question, is that there is a colon missing after else. Try this: def reclass(a): if (a <= 5 …

You seem to know how to do this in the ArcGIS Field Calculator. Instead, do exactly the same thing using the Calculate Field tool, taking care to set your parser to Python. Once you have run the too …

I would use a Python expression like the following by checking Advanced on the Label Expression dialog of the Labels tab of the Properties dialog: def FindLabel ( [TestField] ): return [TestField]. …

The problem is in your code block. Instead of: def Reclass( !CODE! , !COMPLEX! ): if ( !CODE! == 1.1.7 and !COMPLEX! == 4): return 1.3 elif ( !CODE! == 3.2.0 and !COMPLEX! == 4): …

I would start with this simple case: >>> x = "A-AA00" >>> print x A-AA00 >>> print x.replace("0","") A-AA >>> From there some of the codeblock examples for Python from the ArcGIS 10 Help should gi …

Expanding on the answer from cag I just tested the code below which should do what you want. You just need to have your original and new field (called OrigField and NewField in my test) already in th …

The first thing that I would check is whether your feature class has a field called FULLNAME. The error message that you are receiving suggests that it does not.

I think the easiest way to learn "how to use ArcPy to run a field calculation" is to: Go to the Search window and find the Calculate Field tool Open its tool dialog Configure a test calculation and …

The underlying cause of this problem seems to be bug number NIM059424 which was present in ArcGIS Desktop 10.0 and resolved by ArcGIS 10.1 for Desktop: Null values in the feature class do not get …

This question, and its first answer, appear to have been written at a time prior to the Python Parser becoming available for writing Label Expressions. In this case I think the expression (untested) …

Yes, as @Fezter commented: if you wanted to you could import the csv module and read the file that way but I think it would be easier to just use the Join Field tool: Joins the contents of …

I do not think you will find a way to do this because there is an existing, not yet Under Consideration, ArcGIS Idea to have the 'Field Calculator default to Python'.

There is no ArcPy function named GetParameterAsFloat. You will need to use arcpy.GetParameterAsText() (or possibly arcpy.GetParameter()). Using print() statements to show what values have been passe …

The way I just did this assumes that you are using a file geodatabase features class, with an OBJECTID field that starts at 1. I've called my date field DateField so change that for yours. Parser: …