ISO_INPUT_FORMATS is a dictionary with 3 entries: tuple with an element string '%Y-%m-%d' for 'DATE_INPUT_FORMATS',
ISO_INPUT_FORMATS = { 'DATE_INPUT_FORMATS' : ( '%Y-%m-%d' , ) , 'TIME_INPUT_FORMATS' : ( '%H:%M:%S' , '%H:%M:%S.%f' , '%H:%M' ) , 'DATETIME_INPUT_FORMATS' : ( '%Y-%m-%d %H:%M:%S' , '%Y-%m-%d %H:%M:%S.%f' , '%Y-%m-%d %H:%M' , '%Y-%m-%d' ) , }