字符串，数字数组

本文介绍了字符串，数字数组的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

从一个节目我产生一串数据，并将其存储在一个文件中。的文件的内容的一个例子是

From one program I generate bunch of data and it is stored in a file. An example of the file's contents is

[[1, 2, 3], [4, 5, 6]]

正如你所看到的，数据有一个数组的确切形式。后来在另一个程序我想读取数据，并使用它。我使用

As you can see, the data has the exact form of an array. Later in another program I want to read the data and use it. I am using

text_file = open('DataFile.txt') lines = text_file.readlines() #We have only 1 line but this doesn't matter

变量行 1元素的数组是字符串 [1，2，3]，[4，5，6 ]] 。我想这个字符串再次数值数组。只是同样的分隔符等等。我怎么能这样做？

The variable lines is an array of 1 element which is the string [[1, 2, 3], [4, 5, 6]]. I want this string to be again a numeric array. Just with the same delimiters etc. How can I do this?

推荐答案

您可以使用的 ast.literal_eval ：

You can use ast.literal_eval:

>>> from ast import literal_eval >>> mystr = '[[1, 2, 3], [4, 5, 6]]' >>> x = literal_eval(mystr) >>> x [[1, 2, 3], [4, 5, 6]] >>> type(x) <type 'list'> >>>