# Join Lists

**URL:** <https://forum.dynamobim.com/t/join-lists/80236>\
**Category:** Revit\
**Tags:** revit, geometry, dynamo\
**Created:** [August 24, 2022, 7:29am UTC](https://forum.dynamobim.com/t/join-lists/80236 "2022-08-24T07:29:26Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![ahmadkhalaf7892](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/ahmadkhalaf7892/32/131910_2.png) [@ahmadkhalaf7892](https://forum.dynamobim.com/u/ahmadkhalaf7892)\
**Post date:** [August 24, 2022, 7:29am UTC](https://forum.dynamobim.com/t/join-lists/80236/1 "2022-08-24T07:29:26Z")

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![Join lists](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/2/b/2bf375403d850b217e7a754bee5741f74f9bbf58.png)  
Hello guys ,  
I was wondering how can I join these lists in a way so that sub lists 0,0 are joined together, then List 1,1 are joined together etc…  
Is there anyway I can do that ?

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**Author:** ![Draxl\_Andreas](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/draxl_andreas/32/145744_2.png) [@Draxl\_Andreas](https://forum.dynamobim.com/u/Draxl_Andreas)\
**Post date:** [August 24, 2022, 7:41am UTC](https://forum.dynamobim.com/t/join-lists/80236/2 "2022-08-24T07:41:55Z")

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@ahmadkhalaf7892 ,

thats a step forward…

```auto
# Phython-Standard- und DesignScript-Bibliotheken laden
import sys
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

# Die Eingaben für diesen Block werden in Form einer Liste in den IN-Variablen gespeichert.
points = IN[0]
morepoints = IN[1]

OUT = []

for i in zip(points,morepoints):
	OUT.append(i)

```

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**Author:** ![ahmadkhalaf7892](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/ahmadkhalaf7892/32/131910_2.png) [@ahmadkhalaf7892](https://forum.dynamobim.com/u/ahmadkhalaf7892)\
**Post date:** [August 24, 2022, 7:55am UTC](https://forum.dynamobim.com/t/join-lists/80236/3 "2022-08-24T07:55:24Z")

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![t](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/b/0/b095792e60adc71445ad912772a1b6873c517dda.png)  
Hi Andreas, Thanks a lot but as you can see in the picture above I still want sub lists 0,1 to be considered as one list I tried using flatten but they were all combined

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**Author:** ![ahmadkhalaf7892](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/ahmadkhalaf7892/32/131910_2.png) [@ahmadkhalaf7892](https://forum.dynamobim.com/u/ahmadkhalaf7892)\
**Post date:** [August 24, 2022, 8:00am UTC](https://forum.dynamobim.com/t/join-lists/80236/4 "2022-08-24T08:00:11Z")

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I just used transpose with levels again, Thanks a lot

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**Author:** ![gilberto.arechigaiba](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/gilberto.arechigaiba/32/204980_2.png) [@gilberto.arechigaiba](https://forum.dynamobim.com/u/gilberto.arechigaiba)\
**Post date:** [August 24, 2022, 8:49am UTC](https://forum.dynamobim.com/t/join-lists/80236/5 "2022-08-24T08:49:52Z")

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This is also a solution Maybe?

 ![List.SetUnion](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/c/b/cb9c78191e4385e9627b73f638d7c62d6ed58d1f.png)

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**Author:** ![ahmadkhalaf7892](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/ahmadkhalaf7892/32/131910_2.png) [@ahmadkhalaf7892](https://forum.dynamobim.com/u/ahmadkhalaf7892)\
**Post date:** [August 24, 2022, 8:50am UTC](https://forum.dynamobim.com/t/join-lists/80236/6 "2022-08-24T08:50:54Z")

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this is Great Gilberto , Thanks a lot

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**Author:** ![Daan](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/daan/32/82246_2.png) [@Daan](https://forum.dynamobim.com/u/Daan)\
**Post date:** [August 24, 2022, 10:36am UTC](https://forum.dynamobim.com/t/join-lists/80236/7 "2022-08-24T10:36:10Z")

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List.Combine with a List.Join as combinator also might work

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**Author:** ![gilberto.arechigaiba](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/gilberto.arechigaiba/32/204980_2.png) [@gilberto.arechigaiba](https://forum.dynamobim.com/u/gilberto.arechigaiba)\
**Post date:** [August 24, 2022, 11:50am UTC](https://forum.dynamobim.com/t/join-lists/80236/8 "2022-08-24T11:50:52Z")

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Amigo @Daan, I have tried it and it actually works, just be careful to add the same amount of lists in both nodes, thanks for the tip!

 ![List.Combine](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/6/0/60799724513f0bfd77751c341bba711d30aaa691.jpeg)