topic Re: How to using python parser in "Script Evaluators" when element is Turn? in ArcGIS Network Analyst Questions

How to using python parser in "Script Evaluators" when element is Turn?

LeoDeng — Wed, 30 Nov 2016 07:08:23 GMT

When calculate the turn value in the network dataset, is Turn.Angle only useful with VB Script? How to edit a pre-logic script code with turn.angle using python language?

ArcMap Version: 10.4.0.5524

Re: How to using python parser in "Script Evaluators" when element is Turn?

DanPatterson_Retired — Wed, 30 Nov 2016 08:31:15 GMT

I don't understand your wrong section... you can't assign to a variable there. The correct section, just takes the Turn and returns it's example. More complex examples Types of evaluators used by a network—Help | ArcGIS for Desktop show a def being used and a field name enclosed in double exclamation marked being used

Re: How to using python parser in "Script Evaluators" when element is Turn?

LeoDeng — Wed, 30 Nov 2016 09:03:00 GMT

I want to add some logic for calculate the turn time with different turn angle.

For example:

This Script Evaluator expression is valid in VB Script:

If Turn.Angle > 270 Then
turnTime = 10
Else
turnTime = 20
End If

Value = turnTime

However this is not valid in python script.

if Turn.Angle > 270:
turnTime = 10
else:
turnTime = 20

Value = turnTime

Re: How to using python parser in "Script Evaluators" when element is Turn?

DanPatterson_Retired — Sat, 11 Dec 2021 07:56:15 GMT

Code blocks in the normal sense, call a function using ! enclosing field names, I don't know if that is your case. You didn't look far enough down in the examples in the link I sent to see their example... so check it out and see if this matches your case.

def somefunc(val):
    if val.Angle > 270:
        turnTime = 10
    else:
        turnTime = 20
    return turnTime


# use this in the value= segment
somefunc(!Turn!)  # if Turn is a field‍‍‍‍‍‍‍‍‍‍