import binascii
s = 'Ύμνος - abc'
byte = s.encode('utf-8')
print(byte)
hex = binascii.hexlify(byte).decode('utf-8')
print(hex)
byte = bytes.fromhex(hex)
print(byte)
'''
run:
b'\xce\x8e\xce\xbc\xce\xbd\xce\xbf\xcf\x82 - abc'
ce8ecebccebdcebfcf82202d20616263
b'\xce\x8e\xce\xbc\xce\xbd\xce\xbf\xcf\x82 - abc'
'''