python将list连续元素和非连续元素分开转换为指定字符串，pythonlist,obj = {}def

python将list连续元素和非连续元素分开转换为指定字符串，pythonlist,obj = {}def

obj = {}def test(nums):    nums.append(0)    for item in nums:        start = obj.get('start', item)        end = obj.get('end', item)        if item - end != 1:            yield "%s"%start if start == end else '%s~%s'%(start, end)            obj['start'] = item        obj['end'] = itemlst = [1, 2, 3, 4, 5, 7, 8, 15, 20, 21, 22, 23, 24, 28]print ','.join([x for x in test(lst)][1:])