How to convert an int to a hex string?
You are looking for the chr function.
You seem to be mixing decimal representations of integers and hex representations of integers, so it's not entirely clear what you need. Based on the description you gave, I think one of these snippets shows what you want.
>>> chr(0x65) == '\x65'True>>> hex(65)'0x41'>>> chr(65) == '\x41'TrueNote that this is quite different from a string containing an integer as hex. If that is what you want, use the hex builtin.