Question

我正在尝试创建一个3x10x10矩阵，我觉得我做得对。我正在尝试让GridSet函数为我设置所有值，并且我在第7行收到“列表索引超出范围”的错误。我不明白我为什么会这样做得到错误。

如果有一个更好的方法来创建矩阵而没有大量的方括号（没有模块，我听说过NumPy，但我想做这个准系统），这将是很好的知道。

我正在运行2.6.x，不确定是哪个版本。任何帮助将不胜感激。

import random

def GridSet(fullGrid):
    letters = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J']
    for j in range(10):
        for i in range(10):
            fullGrid[j][i][0].append(letters[j]+str(i+1))
            fullGrid[j][i][1].append(random.randrange(100)+1)
            fullGrid[j][i][2].append(0)


#main
fullGrid = [[[],[],[],[],[],[],[],[],[],[]],[[],[],[],[],[],[],[],[],[],[]],[[],[],[],        [],[],[],[],[],[],[]],[[],[],[],[],[],[],[],[],[],[]],[[],[],[],[],[],[],[],[],[],[]],[[],[],[],[],[],[],[],[],[],[]],[[],[],[],[],[],[],[],[],[],[]],[[],[],[],[],[],[],[],[],[],[]],[[],[],[],[],[],[],[],[],[],[]],[[],[],[],[],[],[],[],[],[],[]]]
filledGrid = GridSet(fullGrid)
print filledGrid

Answer 1

以下嵌套列表推导应该创建原始列表：

In [13]: [[[None for i in range(3)] for j in range(10)] for k in range(10)]
Out[13]: 
[[[None, None, None],
  [None, None, None],
  [None, None, None],
  [None, None, None],
  [None, None, None],
  [None, None, None],
  [None, None, None],
  [None, None, None],
  [None, None, None],
  [None, None, None]],
 [[None, None, None],
  [None, None, None],
  [None, None, None],
  ... etc

虽然您可以创建整个内容而不是先创建列表然后填充它：

In [23]: l = [[[letters[j]+str(i+1), random.randrange(100)+1, 0] for i in range(10)]for j in range(10)]
In [24]: pprint(l)
[[['a1', 82, 0],
  ['a2', 77, 0],
  ['a3', 64, 0],
  ['a4', 34, 0],
  ['a5', 95, 0],
  ['a6', 69, 0],
  ['a7', 4, 0],
  ['a8', 72, 0],
  ['a9', 83, 0],
  ['a10', 100, 0]],
 [['b1', 19, 0],
  ['b2', 59, 0],
  ['b3', 15, 0],
   ...

Answer 2

有点困惑。这是你试图实现的目标吗？

import random

def GridSet():
    fullGrid = []
    letters = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J']

    for j in range(10):
        collect = []
        for i in range(10):
            collect_sub = []
            collect_sub.append([letters[j] + repr(i+1), random.randrange(100)+1, 0])
            collect.append(collect_sub)
        fullGrid.append(collect)

    return fullGrid

filledGrid = GridSet()

import pprint
pprint.pprint(filledGrid)

<强>输出

[[[['A1', 12, 0]],
  [['A2', 99, 0]],
  [['A3', 91, 0]],
  [['A4', 29, 0]],
  [['A5', 72, 0]],
  [['A6', 24, 0]],
  [['A7', 99, 0]],
  [['A8', 77, 0]],
  [['A9', 39, 0]],
  [['A10', 93, 0]]],
 [[['B1', 54, 0]],
  [['B2', 78, 0]],
  [['B3', 12, 0]],
  [['B4', 78, 0]],
  [['B5', 79, 0]],
  [['B6', 68, 0]],
  [['B7', 80, 0]],
  [['B8', 29, 0]],
  [['B9', 60, 0]],
  [['B10', 48, 0]]],
 [[['C1', 59, 0]],
  [['C2', 20, 0]],
  [['C3', 4, 0]],
  [['C4', 42, 0]],
  [['C5', 91, 0]],
  [['C6', 61, 0]],
  [['C7', 28, 0]],
  [['C8', 68, 0]],
  [['C9', 18, 0]],
  [['C10', 73, 0]]],
 [[['D1', 9, 0]],
  [['D2', 29, 0]],
  [['D3', 81, 0]],
  [['D4', 46, 0]],
  [['D5', 49, 0]],
  [['D6', 95, 0]],
  [['D7', 64, 0]],
  [['D8', 5, 0]],
  [['D9', 26, 0]],
  [['D10', 88, 0]]],
 [[['E1', 62, 0]],
  [['E2', 6, 0]],
  [['E3', 35, 0]],
  [['E4', 37, 0]],
  [['E5', 54, 0]],
  [['E6', 58, 0]],
  [['E7', 85, 0]],
  [['E8', 26, 0]],
  [['E9', 76, 0]],
  [['E10', 85, 0]]],
 [[['F1', 38, 0]],
  [['F2', 67, 0]],
  [['F3', 32, 0]],
  [['F4', 2, 0]],
  [['F5', 76, 0]],
  [['F6', 97, 0]],
  [['F7', 34, 0]],
  [['F8', 30, 0]],
  [['F9', 58, 0]],
  [['F10', 73, 0]]],
 [[['G1', 68, 0]],
  [['G2', 20, 0]],
  [['G3', 60, 0]],
  [['G4', 46, 0]],
  [['G5', 89, 0]],
  [['G6', 85, 0]],
  [['G7', 76, 0]],
  [['G8', 58, 0]],
  [['G9', 86, 0]],
  [['G10', 49, 0]]],
 [[['H1', 22, 0]],
  [['H2', 76, 0]],
  [['H3', 50, 0]],
  [['H4', 2, 0]],
  [['H5', 6, 0]],
  [['H6', 60, 0]],
  [['H7', 92, 0]],
  [['H8', 9, 0]],
  [['H9', 26, 0]],
  [['H10', 91, 0]]],
 [[['I1', 57, 0]],
  [['I2', 89, 0]],
  [['I3', 1, 0]],
  [['I4', 7, 0]],
  [['I5', 25, 0]],
  [['I6', 70, 0]],
  [['I7', 40, 0]],
  [['I8', 21, 0]],
  [['I9', 7, 0]],
  [['I10', 93, 0]]],
 [[['J1', 77, 0]],
  [['J2', 23, 0]],
  [['J3', 24, 0]],
  [['J4', 48, 0]],
  [['J5', 17, 0]],
  [['J6', 64, 0]],
  [['J7', 11, 0]],
  [['J8', 33, 0]],
  [['J9', 23, 0]],
  [['J10', 20, 0]]]]

如果缩进太深，您只需删除fullGrid的附加内容，而不会损坏其他完整性。

Answer 3

你需要一个更好的描述，但我只是想写一些可以轻松解决我认为你正在寻找的问题。

import random

def GridSet(letters):
    letRange = range(len(letters))
    return [ [[letter for letter in letters] for v in letRange], 
             [[random.randrange(100)+1 for i in letRange] for v in letRange], 
             [[0 for i in letRange] for v in letRange] ]

grid = GridSet(["A", "B", "C", "D", "E", "F", "G", "H", "I", "J"])

# len(grid):  3
# len(grid[0]):  10
# len(grid[0][0]):  10

列表索引超出范围的矩阵创建？

3 个答案: