<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def update_progress(opts, progress, progress_iter, out):
    '''
    Update the progress iterator for the given outputter
    '''
    # Look up the outputter
    try:
        progress_outputter = salt.loader.outputters(opts)[out]
    except KeyError:  # Outputter is not loaded
        log.warning('Progress outputter not available.')
        return False
    progress_outputter(progress, progress_iter)