python中的这种列表的定义方式输出是什么？

Question

t = [[i+1+j*n for i in range(n)] for j in range(m)]

Answer 1

等效于：

# t = [[i+1+j*n for i in range(n)] for j in range(m)]

for j in range(m):
   for i in range(n):
      t[i][j] = (i+1+j*n)