Working with the Revit API

- [Instructor] To work with and edit the Revit document…that Dynamo is operating in, we need to understand…what the document manager and…transaction manager classes are,…both of which are found in the Revit API.…The document manager class allows us to access…the document within the Revit project file…that Dynamo is working in.…The document object represents the open Revit project file…and therefore stores access to all the Revit elements…as well as managing all the Revit data and views.…The transaction manager class is required to make changes…inside the Revit document.…

So for example, if we want to move a family…or create a wall, we first need to start a transaction,…make the model change, and then end the transaction.…All the changes we make are committed to the model…once the transaction ends.…If we try to edit the model outside of a transaction,…this will cause an error, as Revit will refuse the request.…I currently have the Dynamo and Revit exercise files…open for this video.…In the Python script node, this is where we left off…