How to sort/group parameters in a list

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1

Hi all,

I’m new to Dynamo and I am trying to size the pipes based on European standards. I managed to create a list to extract the parameters I need and then export this to Excel, however I reached a dead end. The list that I am exporting contains instances of those sections of pipes, which obviously have different lengths. Is there a way to create a list that adds up those lengths of pipes which belong to a specific section and then export this? I would like my exported list to show Section numbers on a column and the total length for that section on a different column.

When designing a water service system, Revit assigns numbers to the sections of the pipe and a unique markCapture 2 to each of those pipe instances (pipe tag in picture attached shows Section 1, marks 12895, 12889 and 12890 and the Lengths in mm).

Thank you.

2

I’m not sure how you want to identify specific sections. But here is a way to do it with a wall example.

 

groupbykey

3

Thank you very much for your reply John. I tried replicating your example, but unfortunately it’s not giving me the result I’m after. You’re my hero for the day because I had no clue about Group Items by Key List, so by using this I get the result I want.

Thanks again.

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