如何使用列表理解从列表中列出单个列表？

Question

如何在一行中完成此操作.

   b=[['1','2','3','4','5'],['11','12','13','14','15'],['6','7','8','9','10']]
   c=[]
   for x in b:
        for y in x:
            c.append(int(y))
   c.sort()
   print(c)

预期产量:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]

Answer 1

>>> b=[['1','2','3','4','5'],['11','12','13','14','15'],['6','7','8','9','10']]
>>> sorted(int(j) for i in b for j in i)
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]