smile = "\U0001f600"
smile_bytes = bytes(smile.encode('utf-8'))
smile_bytes_part1 = smile_bytes[:len(smile_bytes)//2]
print(smile_bytes_part1)  # b'\xf0\x9f'
smile_bytes_part2 = smile_bytes[len(smile_bytes)//2:]
print(smile_bytes_part2)  # b'\x98\x80'
print((smile_bytes_part1+smile_bytes_part2).decode('utf-8'))  # 😀