下面这段代码太妙了，解决了我一个大问题。我咋就没想到呢？
test = [1,2,3,4,5,6,7,8,9,10,'a','b','c',11,12,13,'14','d',{'a':23}]
test = [test[i:i+7] for i in range(0,len(test),7)]
test
结果如下：
[[1, 2, 3, 4, 5, 6, 7],
[8, 9, 10, 'a', 'b', 'c', 11],
[12, 13, '14', 'd', {'a': 23}]]
