def get_diz_from_colly(filepath):
    """ Get FILE_ID.DIZ from within an ASCII collection. """
    colly = open(filepath, 'r').read()
    colly_diz_begin = '@BEGIN_FILE_ID.DIZ'
    colly_diz_end = '@END_FILE_ID.DIZ'
    pos = colly.find(colly_diz_begin)
    if pos > 0:
        colly = colly[pos + len(colly_diz_begin):]
        pos = colly.find(colly_diz_end)
        if pos > 0:
            return colly[:pos].splitlines()
    return None
