Method strip

python/pathway/internals/expressions/string.py:396–437

Returns a copy of the string with specified leading and trailing characters removed. If no arguments are passed, remove the leading and trailing whitespaces. Example: >>> import pathway as pw >>> table = pw.debug.table_from_markdown( ... ''' ...

(
        self, chars: expr.ColumnExpression | str | None = None
    )

        )

    def strip(
        self, chars: expr.ColumnExpression | str | None = None
    ) -> expr.ColumnExpression:
        """Returns a copy of the string with specified leading and trailing characters
        removed. If no arguments are passed, remove the leading and trailing whitespaces.


        Example:

        >>> import pathway as pw
        >>> table = pw.debug.table_from_markdown(
        ...     '''
        ...      | name
        ...    1 | Alice
        ...    2 | Bob
        ...    3 | CAROLE
        ...    4 | david
        ... '''
        ... )
        >>> table += table.select(name_strip=table.name.str.strip("Aod"))
        >>> pw.debug.compute_and_print(table, include_id=False)
        name   | name_strip
        Alice  | lice
        Bob    | Bob
        CAROLE | CAROLE
        david  | avi
        """

        return expr.MethodCallExpression(
            (
                (
                    (dt.STR, dt.Optional(dt.STR)),
                    dt.STR,
                    lambda x, y: api.Expression.apply(
                        str.strip, x, y, dtype=dt.STR.to_engine()
                    ),
                ),
            ),
            "str.strip",
            self._expression,
            chars,
        )

    def title(self) -> expr.ColumnExpression:
        """Returns a copy of the string where where words start with an uppercase character