I am a beginner and I am trying to perform bit wise operations on an element from 'byte' array
Example code:
step1_result[i] = (bytes((seedrandom[i] >> 3)) | bytes((seedrandom[i] << 5)))
>>> TypeError: unsupported operand type(s) for >>: 'bytes' and 'bytes'
step1_result and seedrandom is a list with 'byte' type elements
Is there a specific method to apply bitwise operations on a byte in Python?
Python's bitwise operators only operate on integers, so you need to convert each byte to an int before performing a bitwise operation.
import sys
b1, b2 = [b'\x77', b'\x88']
int.from_bytes(b1, sys.byteorder) << int.from_bytes(b2, sys.byteorder)
Note that explicit conversion is not necessary if your bytes are in an actual bytearray, because indexing on a bytearray returns ints.
ba = bytearray(b'\x77\x01')
ba[0] << ba[1]
Likewise if the bytes are in a composite bytes object
bs = b'\x77\x01'
bs[0] << bs[1]
bytes is an immutable sequence type, not a numeric type. Did you mean an elementwise operation, such as bytes(map(lambda x: (x<<3) & 0xff, b'\xff\x03')) (list comprehension form: bytes([(x<<3) & 0xff for x in b'\xff\x03']))? Note that bytes can't exceed 255, so I needed to mask to 8 bits before collecting it in a second bytes object. Python doesn't have a standard type for a singular byte, just as it doesn't have one for a singular character. If you read a single element from a bytes object that byte is converted into an int.
>>.bytescan be thought of as a list of characters, so shifting that by otherbytesis undefined.>>with twobytesas operands in that code.