def add_item_upload_callback(callback):
session.item_upload_callbacks.append(callback)<EOL>
Pass a function to be called when an item is created. This can be quite
useful for performing actions such as notifications of upload progress as
well as calling additional API functions.

:param callback: A function that takes three arguments. The first argument
    is the communicator object of the current pydas context, the second is
    the currently active API token and the third is the id of the item that
    was created to result in the callback function's invocation.
:type callback: (Communicator, string, int) -> unknown