The <insert> block allows you to add an element to a specific index in a list; it directly references the Python function: .insert()
See the Python documentation for more details.
•« list » : The variable to which you want to add an element; the default value is an empty list.
•« index » : The index in the list where the new element will be inserted
•« elem » : The element to be added to the “list” input; the default value is 0 (int)
•« list » : (of the type defined by the “type” input)
The “list” input and output are of type list
The “index” input is of type int
The “elem” input can be of any type
Since “list” output = “list” input.insert(“index”, “elem”), after the block executes, the two lists are identical