ls = [[1, 2, -4], [-1, 2, -3], [-2, 2, 1]]
l = len(ls)
for i in range(0, l):
a = i
fdx = []
for j in range(0, l, -1):
fdx.append(ls[j][a])
a += 1
if a == l:
a = 0
print(fdx)
结果:
[]
[]
[]
ls = [[1, 2, -4], [-1, 2, -3], [-2, 2, 1]]
l = len(ls)
for i in range(0, l):
a = i
fdx = []
for j in range(0, l, -1):
fdx.append(ls[j][a])
a += 1
if a == l:
a = 0
print(fdx)
结果:
[]
[]
[]
range(0,1) 得问题
range(a,b) 是一个等差递增数列。起点为a,终点为b.且不包含b.
range(0,1,-1)是一个等差递减数列。起点a>终点b,才可以。