human
What is a the Python code you requested given the following:
Complete the below
def check_stack_complete(cnxt, stack, current_traversal, sender_id, deps, is_update):

    ''''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.'
    '''
assistant
#Here is the Python code you requested.
    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})