用Unicode将Pandas DataFrame写入JSON [英] Writing pandas DataFrame to JSON in unicode

问题描述

我试图将包含unicode的pandas DataFrame写入json，但是内置的.to_json函数转义了字符.我该如何解决?

I'm trying to write a pandas DataFrame containing unicode to json, but the built in .to_json function escapes the characters. How do I fix this?

示例:

import pandas as pd
df = pd.DataFrame([['τ', 'a', 1], ['π', 'b', 2]])
df.to_json('df.json')

这给出了:

{"0":{"0":"\u03c4","1":"\u03c0"},"1":{"0":"a","1":"b"},"2":{"0":1,"1":2}}

与期望的结果不同:

{"0":{"0":"τ","1":"π"},"1":{"0":"a","1":"b"},"2":{"0":1,"1":2}}

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我尝试添加force_ascii=False参数:

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I have tried adding the force_ascii=False argument:

import pandas as pd
df = pd.DataFrame([['τ', 'a', 1], ['π', 'b', 2]])
df.to_json('df.json', force_ascii=False)

但这会导致以下错误:

UnicodeEncodeError: 'charmap' codec can't encode character '\u03c4' in position 11: character maps to <undefined>

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我正在将WinPython 3.4.4.2 64bit与pandas 0.18.0一起使用

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I'm using WinPython 3.4.4.2 64bit with pandas 0.18.0

推荐答案

打开编码设置为utf-8的文件，然后将该文件传递给.to_json函数可解决此问题:

Opening a file with the encoding set to utf-8, and then passing that file to the .to_json function fixes the problem:

with open('df.json', 'w', encoding='utf-8') as file:
    df.to_json(file, force_ascii=False)

给出正确的答案:

{"0":{"0":"τ","1":"π"},"1":{"0":"a","1":"b"},"2":{"0":1,"1":2}}

注意:它仍然需要force_ascii=False参数.

Note: it does still require the force_ascii=False argument.

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