Method difference

python/pathway/internals/table.py:988–1022

r"""Restrict self universe to keys not appearing in the other table. Args: other: table with ids to remove from self. Returns: Table: table with restricted universe, with the same set of columns Example: >>> import pathway as pw >>

(self, other: Table)

    @contextualized_operator
    @check_arg_types
    def difference(self, other: Table) -> Table[TSchema]:
        r"""Restrict self universe to keys not appearing in the other table.

        Args:
            other: table with ids to remove from self.

        Returns:
            Table: table with restricted universe, with the same set of columns


        Example:

        >>> import pathway as pw
        >>> t1 = pw.debug.table_from_markdown('''
        ...   | age  | owner  | pet
        ... 1 | 10   | Alice  | 1
        ... 2 | 9    | Bob    | 1
        ... 3 | 8    | Alice  | 2
        ... ''')
        >>> t2 = pw.debug.table_from_markdown('''
        ...   | cost
        ... 2 | 100
        ... 3 | 200
        ... 4 | 300
        ... ''')
        >>> t3 = t1.difference(t2)
        >>> pw.debug.compute_and_print(t3, include_id=False)
        age | owner | pet
        10  | Alice | 1
        """
        context = clmn.DifferenceContext(
            left=self._id_column,
            right=other._id_column,
        )
        return self._table_with_context(context)

    @check_arg_types
    def intersect(self, *tables: Table) -> Table[TSchema]: