Hex - Convert bytes to bits in python

Questions

I am working with Python3.2. I need to take a hex stream as an input and parse it at bit-level. So I used

bytes.fromhex(input_str)

to convert the string to actual bytes. Now how do I convert these bytes to bits?

Answers

http://packages.python.org/bitstring/index.html# http://packages.python.org/bitstring/index.html#

>>> from bitstring import BitArray
>>> input_str =  0xff 
>>> c = BitArray(hex=input_str)
>>> c.bin
 0b11111111 

And if you need to strip the leading 0b:

>>> c.bin[2:]
 11111111 

The bitstring module isn t a requirement, as jcollado s answer shows, but it has lots of performant methods for turning input into bits and manipulating them. You might find this handy (or not), for example:

>>> c.uint
255
>>> c.invert()
>>> c.bin[2:]
 00000000 

etc.

Source

License : cc by-sa 3.0

http://stackoverflow.com/questions/8815592/convert-bytes-to-bits-in-python

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