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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def save_to(self, file):
 """Save data to file. Will copy by either writing out the data or using :func:`shutil.copyfileobj`. :param file: A file-like object (with a ``write`` method) or a filename."""

        dest = file

        if hasattr(dest, 'write'):
            # writing to a file-like
            # only works when no unicode conversion is done
            if self.file is not None and\
                    getattr(self.file, 'encoding', None) is None:
                copyfileobj(self.file, dest)
            elif self.filename is not None:
                with open(self.filename, 'rb') as inp:
                    copyfileobj(inp, dest)
            else:
                dest.write(self.__bytes__())
        else:
            # we do not use filesystem io to make sure we have the same
            # permissions all around
            # copyfileobj() should be efficient enough

            # destination is a filename
            with open(dest, 'wb') as out:
                return self.save_to(out)