class package:
    @staticmethod
    def _get_encoding() -> str:
        return str("UTF-8")
    
    def __init__(self, content: str) -> None:
        self.__content = content.encode("UTF-8")

    @property
    def size(self) -> int:
        return len(self.content)

    @property
    def content(self) -> bytes:
        return self.__content

    def get_part(self, begin: int, end: int) -> None:   
        return self.__content[begin: end]