如何在Python中创建2D数组 [英] How to create 2D arrays in Python

问题描述

我正在尝试在Python中创建索引的2D数组，但是我一直以一种或另一种方式遇到错误.

Im trying to create an indexed 2D array within Python, but I keep running into errors, one way or another.

以下代码:

#Declare Constants (no real constants in Python)
PLAYER = 0
ENEMY = 1
X = 0
Y = 1
AMMO = 2
CURRENT_STATE = 3
LAST_STATE = 4

#Initilise as list
information_state = [[]]
#Create 2D list structure
information_state.append([PLAYER,ENEMY])
information_state[PLAYER].append ([0,0,0,0,0])#X,Y,AMMO,CURRENT_STATE,LAST_STATE
information_state[ENEMY].append([0,0,0,0,0])#X,Y,AMMO,CURRENT_STATE,LAST_STATE


for index, item in enumerate(information_state):
        print index, item

information_state[PLAYER][AMMO] = 5

创建以下输出:

0 [[0, 0, 0, 0, 0]]
1 [0, 1, [0, 0, 0, 0, 0]]
IndexError: list assignment index out of range

我习惯于使用PHP数组，例如:

Im used to using PHPs arrays, eg:

$array['player']['ammo'] = 5;

Python中有类似的东西吗?我听说有人推荐numpy，但我不知道它是不是:(

Is there anything similar in Python? I heard people recommending numpy, but i couldn't figure it out :(

这是Python的新知识.

Im new to this Python stuff.

注意:使用Python 2.7

Note: Using Python 2.7

推荐答案

我认为您应该看看python的

i think you should have a look at python's data structures tutorial and what you're looking for is called a dictionary here, which is a list of key-value pairs.

在您的情况下，您可以使用嵌套字典作为键的值，以便可以调用

in your case, you could use a nested dictionary as a value for a key, so that you could call

## just examples for you ##

player_dict_info = {'x':0, 'y':0, 'ammo':0}
enemy_dict_info = {'x':0, 'y':0, 'ammo':0}
information_state = {'player': player_dict_info, 'enemy': enemy_dict_info}

并像在php中一样访问每个元素

and access every element like you did in php

这篇关于如何在Python中创建2D数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！