Numbering parameter family

[franck.pradal]

Hello,
I am new to the world of dynamo.
I apologize beforehand for my very bad English.
I’m trying to

based on several parameters.
(number of items in the list, start number, increment and prefix)

But I can not,
can you help me thanks in advance

Note: The python code keeps the order of the selection

Creating a list of user-picked elements?

There’s a better approach as described here by Troy Gates: https://forums.autodesk.com/t5/revit-api/revit-api-selected-element-set-order/td-p/5597203 in ipy that code would look like this: [2016-04-01_12-14-30]

Translated by Google

[Yna_Db]

@franck.pradal

The python code keeps the order of the selection

Please show this python script also and see first if existing resources can not help:
https://forum.dynamobim.com/search?q=data-shapes

UI.MultipleInputForm ++

[franck.pradal]

Yes of course

Merci

[Yna_Db]

Did you already see existing resources about how to manage lists? These links can help you to get started for instance:
http://dynamoprimer.com/en/06_Designing-with-Lists/6-3_lists-of-lists.html
http://dictionary.dynamobim.com/#/

Managing Lists in Dynamo

Please try something and send your attempts or at least a preliminary schema that shows how you aim to organize the data.

[franck.pradal]

I have read the different links, but I still do not understand the subtlety like for example the loopwhile.

I want a loop of the node in green a number of times determined by the output of the list.count

Thank you for your patience

[Yna_Db]

You’re welcome. Here are some good links about LoopWhile:
http://dictionary.dynamobim.com/#/BuiltIn/Action/LoopWhile

Loop with Python

You should give the LoopWhile node a try: [image] loop1.dyn (9.6 KB) _loop1.dyf (11.5 KB)

LoopWhile and Functions

Hi! I am struggling and hoping someone is able to help. I am trying to make a list where the next number in the list is based off the number before it. Specifically, I have three numbers (1,2,3), and I want the next number in the sequence not to be the previous number, and random between the other two. I also want this to stop at a specific number, and I think I have that part figured out. My thinking is that I use 'List.LastItem" to get the last number in the list and plug that into ‘SetDiff…

[viktor_kuzev]

Hi. I’m sure you can accomplish this with loopwhile. But I think there might be a simpler approach.
Not sure exactly what’s your end goal but take a look at this:

[Vikram_Subbaiah]

@franck.pradal You very rarely would need to resort to using Loop While
Here is an example that might be similar to what you’re trying to do…
Sequence.dyn (10.6 KB)

[franck.pradal]

A great Thanks Vikram_Subbaiah, I finally realized my first program Dynamo.
The end result perfectly meets my expectations
I have not yet figured out how to use LoopWhile, I think the path will be long but I persevere;)

Thank you all for your help