Slider expressions extract with python?

Scripting
1

Hey guys how would one get the sliders expression from the given slider?

I barely understand python so a working example would be nice, I personally haven’t found documentation on how to extract this exact parameter. Thank you for your help in advance!

image
image374×543 14.2 KB

Regards,

Jonas Blazinskas

2

sliderExpression
sliderExpression1516×482 36.5 KB 

import Grasshopper as gh
objs = ghenv.Component.Params.Input[0].Sources
for obj in objs:
    if type(obj) is gh.Kernel.Special.GH_NumberSlider:
        print obj.Expression

sliderExpression.gh (14.4 KB)

1 Like
3

Thank you very much! Just realised that even tho I now have the expressions, I am not sure of how to do a calculation with a string expression like this. Do you have any ideas on how could I plug my x value in now? Or would I have to write a custom python script for this?

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4

You can use Evaluate Component:

Evaluate
Evaluate1712×482 46.7 KB

Evaluate.gh (14.2 KB)

1 Like
5

Awesome! Thank you for your help so much!

6

You can also use eval function in python:

import rhinoscriptsyntax as rs
a = eval(F)

Evaluate.gh (15.3 KB)

1 Like