python中list*n生成多维数组与for循环生成多维数组的区别说明

list0 = [1,2,3]
list1 = [list0] * 3
print('list1 is :',list1)
list1[0][0] = 999
print('new list1 is :',list1)

print('list0 is ',list0)
print(list0 is list1[0])
print(list1[0] is list1[1])

list0 = [(i + 1) for i in range(3)]
list2 = [[(i + 1) for i in range(3)] for _ in range(3) ]
print('list2 is :',list2)
list2[0][0] = 999
print('new list2 is :',list2)
 
print('list0 is ',list0)
print(list0 is list2[0])
print(list2[0] is list2[1])

# coding:utf-8
# 使用Python3中的print函数
from __future__ import print_function
arr = []
# 基本思想是在list中动态添加list，每个list可以嵌套，这样就可以形成多维数组了
# arr中保存的而是row的集合，row中保存的是col的集合
# 这是一个3×3×2的三维数组
for i in range(3):
     row = []
     for j in range(3):
         col = []
         col.append(i + j)
         col.append(i * j)
         row.append(col)
     arr.append(row)
print(arr)
print("Output Result:")
for i in range(3):
    for j in range(3):
        for k in range(2):
            print('[', end='')
            print(i, end=', ')
            print(j, end=', ')
            print(k, end='] = ')
            print(arr[i][j][k])