将字节字符串转换为base64编码的字符串(输出不是字节字符串) [英] Convert byte string to base64-encoded string (output not being a byte string)

问题描述

我想知道是否可以将读取文件时得到的字节字符串转换为字符串(因此type(output) == str).到目前为止，我在Google上发现的所有答案都是您如何基于base-64编码PNG图片以用于data-uri ，这似乎可以在python 2中使用(如果我没记错的话，字符串无论如何都是字节字符串)，但是在python 3.4中不再起作用. >

我想将此结果字节字符串转换为普通字符串的原因是，我想使用此base64编码的数据存储在JSON对象中，但我不断收到类似于以下内容的错误:

TypeError: b'Zm9v' is not JSON serializable

这是出现错误的最小示例:

import base64
import json
data = b'foo'
myObj = [base64.b64encode(data)]
json_str = json.dumps(myObj)

所以我的问题是:有一种方法可以将bytes类型的对象转换为str类型的对象，同时仍保持base64编码(因此，在此示例中，我希望结果为.这可能吗?

解决方案

尝试

data = b'foo'.decode('UTF-8')

代替

data = b'foo'

将其转换为字符串.

I was wondering if it is possible to convert a byte string which I got from reading a file to a string (so type(output) == str). All I've found on Google so far has been answers like How do you base-64 encode a PNG image for use in a data-uri in a CSS file?, which does seem like it would work in python 2 (where, if I'm not mistaken, strings were byte strings anyway), but which doesn't work in python 3.4 anymore.

The reason I want to convert this resulting byte string to a normal string is that I want to use this base64-encoded data to store in a JSON object, but I keep getting an error similar to:

TypeError: b'Zm9v' is not JSON serializable

Here's a minimal example of where it goes wrong:

import base64
import json
data = b'foo'
myObj = [base64.b64encode(data)]
json_str = json.dumps(myObj)

So my question is: is there a way to convert this object of type bytes to an object of type str while still keeping the base64-encoding (so in this example, I want the result to be ["Zm9v"]. Is this possible?

解决方案

Try

data = b'foo'.decode('UTF-8')

instead of

data = b'foo'

to convert it into a string.

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