如何在python中将列表转换为jsonarray [英] How to convert a list to jsonarray in python

问题描述

我有以下格式的行:

row = [1L,[0.1,0.2],[[1234L,1],[134L,2]]]

现在，我要在文件中写入以下内容:

Now, what I want is to write the following in the file:

[1,[0.1,0.2],[[1234,1],[134,2]]]

基本上将上面转换成jsonarray吗?

Basically converting above into a jsonarray?

是否有内置的方法，可以在python中将数组转储"到json数组中?

Is there an inbuilt method, function in python to "dump" array into json array?

还请注意，我不希望在文件中序列化"L".

Also note that I don't want "L" to be serialized in my file.

推荐答案

使用 json模块产生JSON输出:

Use the json module to produce JSON output:

import json

with open(outputfilename, 'wb') as outfile:
    json.dump(row, outfile)

这会将JSON结果直接写入文件(如果文件已经存在，则替换以前的任何内容).

This writes the JSON result directly to the file (replacing any previous content if the file already existed).

如果您需要Python本身中的JSON结果字符串，请使用json.dumps()(为添加s):

If you need the JSON result string in Python itself, use json.dumps() (added s, for 'string'):

json_string = json.dumps(row)

L只是用于长整数值的Python语法； json库知道如何处理这些值，因此不会编写任何L.

The L is just Python syntax for a long integer value; the json library knows how to handle those values, no L will be written.

演示字符串输出:

>>> import json
>>> row = [1L,[0.1,0.2],[[1234L,1],[134L,2]]]
>>> json.dumps(row)
'[1, [0.1, 0.2], [[1234, 1], [134, 2]]]'

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