TypeError: string argument without an encoding with binary data

Question

I am receiving a binary stream (over a socket) and converting it to bytearray. After running for about 6hrs (and sometimes even after few minutes) I am getting the following error:

TypeError: string argument without an encoding

on the line:

str = binascii.hexlify(bytearray(result))

The code which is receiving the data and converting it to bytearray is as follows :

try:
    result = so.recv()
    str = binascii.hexlify(bytearray(result))
except:

I referred to the question Python String argument without an encoding and Python 3 documentation but no luck in solving this issue.

Could this be corrupted data in the stream (maybe a network issue)?