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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 _proc_gnusparse_10(self, next, pax_headers, tarfile):
 """Process a GNU tar extended sparse header, version 1.0. """

        fields = None
        sparse = []
        buf = tarfile.fileobj.read(BLOCKSIZE)
        fields, buf = buf.split(b"\n", 1)
        fields = int(fields)
        while len(sparse) < fields * 2:
            if b"\n" not in buf:
                buf += tarfile.fileobj.read(BLOCKSIZE)
            number, buf = buf.split(b"\n", 1)
            sparse.append(int(number))
        next.offset_data = tarfile.fileobj.tell()
        next.sparse = list(zip(sparse[::2], sparse[1::2]))