如何在Python中的循环中重命名变量 [英] How to rename variables in a loop in Python

问题描述

我想在Python中运行一个循环多次的程序，每次创建一个NEW数组-即没有数据被覆盖-命名数组时要引用循环号，这样我就可以在后续循环中调用它.例如，我可能想在从0到i的循环中创建数组x0，x1，x2，...，xi，然后在另一个循环中对相同变量进行调用，以分别调用数组x0，x1，x2，...，xi.(基本上相当于能够将变量作为'string％d％(x)'放入字符串中).

I want to run a program in Python which loops several times, creating a NEW array each time - i.e. no data is overwritten - with the array named with a reference to the loop number, so that I can call it in subsequent loops. For instance, I might want to create arrays x0, x1, x2, ..., xi in a loop running from 0 to i, and then call each of these in another loop running over the same variables. (Essentially the equivalent of being able to put a variable into a string as 'string %d %(x)').

推荐答案

使用字典:

arraysDict = {}
for i in range(0,3):
    arraysDict['x{0}'.format(i)] = [1,2,3]

print arraysDict
# {'x2': [1, 2, 3], 'x0': [1, 2, 3], 'x1': [1, 2, 3]}
print arraysDict['x1']
# [1,2,3]

使用列表:

arraysList = []
for i in range(0,3):
    arraysList.append([1,2,3])

print arraysList
# [[1, 2, 3], [1, 2, 3], [1, 2, 3]]
print arraysList[1]
# [1, 2, 3]

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