The private critical is 64 hexadecimal characters. Each and every string of sixty four hex are, hypothetically, an Ethereum private key (see hyperlink at top for why this is not absolutely precise)Private_key: 7231bfb75a41481965e391fb6d4406b6c356d20194c5a88935151f05136d2f2e Private_key_bytes: b'r1xbfxb7ZAHx19exe3x91xfbmDx06xb6xc3Vxd2x01x94xc5xa8x89