python-3.xbyteextractlsb

Extract LSB bit from a Byte in python

I have a byte in variable 'DATA'. I want to extract the LSB bit out of it and print it. I'm very new to python, I found many articles with complex bitwise addition logic and all which was very tough to understand. I'm looking for a simple logic like we do with the strings eg DATA[7:1] Please help me out...

Solution

  • Is your "byte" an int? If so, just take bitwise AND (&) with 1 (or, if you want to be more explicit, the binary literal 0b1) to get the least significant bit.

    >>> x = 14
>>> x & 1
0
>>> x = 15
>>> x & 1
1

    Is your "byte" a bytes object? If so, just index into it and take bitwise AND.

    >>> y = bytes([14, 15])
>>> y[0] & 1
0
>>> y[1] & 1
1