Hi, guys.
I’m trying to get items except first and last and keep the structure of the list
But I think I missed lacing or level settings, please give me any advices
Hi @jaeho
I’ve made a python script which removes the first and last element in a list. It doesn’t keep the structure owned by the input list. It returns only elements contained in a list if the length of the list is bigger than two.
import sys
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
input_list = IN[0]
output_list = []
def remove_fist_last_item(input_list):
if any(isinstance(item, list) for item in input_list):
for item in input_list:
if isinstance(item, list):
remove_fist_last_item(item)
else:
if len(input_list) > 2:
output_list.append(input_list[1:-1])
remove_fist_last_item(input_list)
OUT = output_list
@Meychik @Mark.Ackerley Hi, Thank you for your solutions the problem is both approaches don’t keep the Empty List…
It seems to work as you wanted it to be.
import sys
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
input_list = IN[0]
lst = [1,2,3,4]
def remove_first_last_items(input_list):
if any(isinstance(item, list) for item in input_list):
for item in input_list:
if isinstance(item, list):
remove_first_last_items(item)
else:
if len(input_list) > 2:
input_list.pop(0)
input_list.pop(-1)
remove_first_last_items(input_list)
OUT = input_list
Hi@Meychik,
Thank you for your solution again! 
Hello,
a node version
Cordially
christian.stan
@christian.stan Thank you for your solution. I haven’t thought about the codeblock like that for amount. Good approach