Question

In python, assume that there is data when I run…

search = target.readframes(2205)

Each frame consist of 2 bytes. I want to compare each 2-byte value and extract highest 2 values in the range.

For example, if the data looks like this…

0000|0001|0002|0008|0007|000F|000D|000A|00FB|00FC|00FA|00F9|00F8|00D7|00C3|0000

Then the result would extract 000F and 00FC

Could someone please help me achieve this. Any answers or helpful advise would be great.

Answer 1

First, you should use only bytes objects if you deal with binary data. They require Python 2.6+.

Example

data = b"\x42\x43\x44\x45"
print(data[0:2], data[2:4])

And yes, you can use normal compare operations with bytes.

I am not sure that kind of object is returned by your readframes but if it is not bytes by design you should convert it to bytes. You can just use data = bytes(obj).

Do not use strings to process binary data.