Method _validate_non_negative_integer_or_none

dash/dash_table/Format.py:109–117

(self, value)

            raise ValueError("expected value to a string of length one")

    def _validate_non_negative_integer_or_none(self, value):
        if value is None:
            return

        if not isinstance(value, int):
            raise TypeError("expected value to be an integer")

        if value < 0:
            raise ValueError("expected value to be non-negative", str(value))

    def _validate_named(self, value, named_values):
        if value not in named_values: