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

Question

This question already has answers here:

How do I represent and work with n-bit vectors in Python? (7 answers)

Closed 9 years ago.

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?

Answer 1

int constructor can do this very easily :

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

Answer 2

Use binascii module.

Ex:

binascii.a2b_hex('A0')