python set difference_python set 排除

参考链接： Python set集合 difference_update ()

#定义全部ID号列表

 available_id_set = set(range(1,100))

 #排除ID

 instances = [1,2,88]

 #获取剩余可用的ID号

 available_id_set.difference_update(set(instances))

 available_id = ["%0.2d" % i for i in available_id_set]

 print available_id

 ['03', '04', '05', '06', '07', '08', '09', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31', '32', '33', '34', '35', '36', '37', '38', '39', '40', '41', '42', '43', '44', '45', '46', '47', '48', '49', '50', '51', '52', '53', '54', '55', '56', '57', '58', '59', '60', '61', '62', '63', '64', '65', '66', '67', '68', '69', '70', '71', '72', '73', '74', '75', '76', '77', '78', '79', '80', '81', '82', '83', '84', '85', '86', '87', '89', '90', '91', '92', '93', '94', '95', '96', '97', '98', '99']