Method is_not_none

python/pathway/internals/expression.py:301–320

Returns true if the value is not None. Example: >>> import pathway as pw >>> t1 = pw.debug.table_from_markdown(''' ... | owner | pet ... 1 | Alice | dog ... 2 | Bob | ... 3 | Carol | cat ... ''') >>> t2 = t1.with_columns(h

(self)

        return IsNoneExpression(self)

    def is_not_none(self) -> IsNotNoneExpression:
        """Returns true if the value is not None.

        Example:

        >>> import pathway as pw
        >>> t1 = pw.debug.table_from_markdown('''
        ...   | owner | pet
        ... 1 | Alice | dog
        ... 2 | Bob   |
        ... 3 | Carol | cat
        ... ''')
        >>> t2 = t1.with_columns(has_pet=pw.this.pet.is_not_none())
        >>> pw.debug.compute_and_print(t2, include_id=False)
        owner | pet | has_pet
        Alice | dog | True
        Bob   |     | False
        Carol | cat | True
        """
        return IsNotNoneExpression(self)

    # Missing `__iter__` would make Python fall back to `__getitem__, which
    # will not do the right thing.