How to convert bytes string to integer values?

Question

I am working on a project in which i send a base64 encoded image from my app to a server where the processing happens. The image received on the server is like this: (this data is huge)

b'\xff\xd8\xff\xe1\x02;Exif\x00\x00MM\x00*\x00\.....'

So, now i want to convert it in this format: [255, 234, 70, 115, ....].

Does this answer your question? [How to convert a string of bytes into an int?](https://stackoverflow.com/questions/444591/how-to-convert-a-string-of-bytes-into-an-int) — Shivam Jha, Jul 04 '20 at 07:46
Did you try `list(img_data)`? Depending on your definition of "huge" (i.e. if it actually doesn't fit in memory) you may want to do `for c in iter(img_data)` instead. — Jordan Dimov, Jul 04 '20 at 07:53
@JordanDimov Yes, didn't know it would be that simple :), Thanks — , Jul 04 '20 at 08:10

score 1 · Accepted Answer · answered Jul 04 '20 at 08:03

1

Just throw the list constructor at it.

>>> list(b'\xff\xd8\xff\xe1')
[255, 216, 255, 225]

answered Jul 04 '20 at 08:03

timgeb

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score 0 · Answer 2 · answered Jul 04 '20 at 07:53

Assuming you use Python3, iterating over the byte string actually gives you individual values as an int type:

>>> s = b'\xff\xd8\xff\xe1\x02'
>>> for c in s:
...     print(c, type(c))
... 
255 <class 'int'>
216 <class 'int'>
255 <class 'int'>
225 <class 'int'>
2 <class 'int'>

How to convert bytes string to integer values?

2 Answers2