Problem when iterating through lists of different size and levels in python

Revit
1

I have two lists of diferent sizes and diferent amount of levels.
I need to iterate both lists but i keep getting error messages

L1 has level 1 and 2
L2 has level 1, 2 and 3

i need to create a list that returns for me the value of L2 at level 2 that is the first one bigger than the value of L1

image
image.png1920×1080 301 KB

image
image.png1920×1080 302 KB

This is the code
import clr
clr.AddReference(‘ProtoGeometry’)
from Autodesk.DesignScript.Geometry import *
#The inputs to this node will be stored as a list in the IN variables.
L1 = [1.69, 18.75]
L2 = [[17.5, 24, 32, 41, 57, 76, 101, 125, 151, 192, 232, 269, 309, 353, 415, 477, 571, 656, 758, 881, 1012],[17.5, 24, 32, 41, 57, 76, 101, 125, 151, 192, 232, 269, 309, 353, 415, 477, 571, 656, 758, 881, 1012]]
res = 

for i, j in L1,L2:
	for num in j:
		if i <= num:
			res.append(num)
			break
	

#Assign your output to the OUT variable.
OUT = res

This is the error message:

Warning: IronPythonEvaluator.EvaluateIronPythonScript operation failed.
Traceback (most recent call last):
File “”, line 10, in
TypeError: iteration over non-sequence of type float

Thank you all in advance for your help!

2

Hi,

Maybe with function zip :

L1 = [1.69, 18.75]
L2 = [[17.5, 24, 32, 41, 57, 76, 101, 125, 151, 192, 232, 269, 309, 353, 415, 477, 571, 656, 758, 881, 1012],[17.5, 24, 32, 41, 57, 76, 101, 125, 151, 192, 232, 269, 309, 353, 415, 477, 571, 656, 758, 881, 1012]]
res = []

for i, j in zip(L1,L2):
	for num in j:
		if i <= num:
			res.append(num)
			break
#Assign your output to the OUT variable.
OUT = res

The result seems correct.
result

3

It solved the problem.
Thank you.
But how exactly does the zip function works?

4

You’re welcome.

The python documentation will explain you better than me how it works.
https://www.programiz.com/python-programming/methods/built-in/zip

I use very often the zip() function in the customs nodes of my package.