human
Complete this python program:
def check_stack_complete(cnxt, stack, current_traversal, sender_id, deps, is_update):
assistant
#Here is the Python program you requested.

    """Mark the stack complete if the update is complete.
    Complete is currently in the sense that all desired resources are in
    service, not that superfluous ones have been cleaned up.
    """
    roots = set(deps.roots())
    if ((sender_id, is_update) not in roots):
        return
    def mark_complete(stack_id, data):
        stack.mark_complete()
    sender_key = (sender_id, is_update)
    sync_point.sync(cnxt, stack.id, current_traversal, True, mark_complete, roots, {sender_key: None})