All classes Dynamo for Revit Beginner Syllabus · Episode 6 of 7

Dynamo for Revit Beginner Class #6: Understanding List

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Episode six of the Dynamo for Revit series: understanding List, first item, last item, reversing order, and specific items. Content: Lists in Code Block and zero-based indexing; List.FirstItem and List.LastItem; List.Reverse; List.GetItemAtIndex; Complete Revit course from beginner to expert (BIM); Script creation services for Dynamo & BIM Revit modeling; A two-story house project file (.rvt) is available. Complete with PDF

Software: Revit 2027 + Dynamo
Level: Beginner
Duration: ± 4 min
Series total: 28 min · 7 videos
Published: October 15, 2026

Episode 6 of 7 · view syllabus

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Transcript

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Introduction

In this episode, we'll learn about lists, the most important data structure in Dynamo. We'll take the first item, last item, reverse the order, and select a specific item. Let's start! Hello! In episode 6, we'll learn about lists in Dynamo. Almost all data in Dynamo is in the form of a list.

Step 1: Open Dynamo from the Manage tab in Revit

Open Dynamo from the Manage tab in Revit, then click Launch Dynamo. Wait until the window opens. On the initial page, click New to create an empty workspace.

Step 3: Create a list of numbers in the Code Block

Create a code block containing the list of numbers 5, 3, 9, 1, 7 with square brackets. Connect it to Watch. Notice the index numbers on the left of each item, starting from 0, not 1.

Step 4: First and last item - List.FirstItem, List.LastItem

Add the list.firstitem node for the first item, and list.lastitem for the last item. The result is 5 and 7. The list.reverse node reverses the order of the list.

Step 5: Reverse the order with List.Reverse

9, 5, and so on, appear reversed in Watch.

Step 6: Get a specific item - List.GetItemAtIndex

For a specific item, use list.getItemAtIndex.

Step 6: Get a specific item - pa

Create a code block containing the number 2 as the index, then connect it with the list.

Step 6: Get a specific item - List.GetItemAtIndex

Since the index starts from 0, the number 2 means the third item, which is 9.

Done! You now know about Lists

Done. You've learned about lists. In the next episode, we'll export data to CSV and save a grab. Goodbye. Want to master Dynamo and Revit? Cerdas Inovasi Digital offers Revit and Dynamo courses, BIM modeling services, and Dynamo script creation. as well as selling project files and Dinamo from this tutorial series. Contact our WhatsApp or visit cerdasinovasidigital.com. See you in the next episode. Goodbye.

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Transcript

0:03Introduction

0:28Step 1: Open Dynamo from the Manage tab in Revit

1:14Step 3: Create a list of numbers in the Code Block

1:38Step 4: First and last item - List.FirstItem, List.LastItem

2:32Step 5: Reverse the order with List.Reverse

2:55Step 6: Get a specific item - List.GetItemAtIndex

3:00Step 6: Get a specific item - pa

3:04Step 6: Get a specific item - List.GetItemAtIndex

3:34Done! You now know about Lists

Ask the class material

My notes

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Transcript

0:03Introduction

0:28Step 1: Open Dynamo from the Manage tab in Revit

1:14Step 3: Create a list of numbers in the Code Block

1:38Step 4: First and last item - List.FirstItem, List.LastItem

2:32Step 5: Reverse the order with List.Reverse

2:55Step 6: Get a specific item - List.GetItemAtIndex

3:00Step 6: Get a specific item - pa

3:04Step 6: Get a specific item - List.GetItemAtIndex

3:34Done! You now know about Lists

Ask the class material

My notes

Questions & answers

Your instructor

Introduction

Step 1: Open Dynamo from the Manage tab in Revit

Step 3: Create a list of numbers in the Code Block

Step 4: First and last item - List.FirstItem, List.LastItem

Step 5: Reverse the order with List.Reverse

Step 6: Get a specific item - List.GetItemAtIndex

Step 6: Get a specific item - pa

Step 6: Get a specific item - List.GetItemAtIndex

Done! You now know about Lists

Introduction

Step 1: Open Dynamo from the Manage tab in Revit

Step 3: Create a list of numbers in the Code Block

Step 4: First and last item - List.FirstItem, List.LastItem

Step 5: Reverse the order with List.Reverse

Step 6: Get a specific item - List.GetItemAtIndex

Step 6: Get a specific item - pa

Step 6: Get a specific item - List.GetItemAtIndex

Done! You now know about Lists