How to change bits in byte with python? [duplicate]

https://stackoverflow.com/questions/23670442

type-conversion
python
io
bit

23-07-2023
|

Question

I have .bmp picture and I need to make some steganography with it.

For this action I have to convert .bmp to list of bytes and then make some changes in bits.

I use open() with "rb" parameter to make bytes list and then convert each byte to string using '{0:08b}'.format(mybyte).

My question is how to convert this string representation of byte back to byte? maybe there are some faster or more correct ways to work with bits?

Solution

int constructor can do this very easily :

>>> s = '{0:08b}'.format(42)
>>> s
'00101010'
>>> int(s, 2)
42

OTHER TIPS

Use binascii module.

Ex:

binascii.a2b_hex('A0')

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