def set_select(self, data):
        """Set the *selected*-attribute of the first option element
        specified by ``data`` (i.e. select an option from a dropdown).

        :param data: Dict of ``{name: value, ...}``.
            Find the select element whose *name*-attribute is ``name``.
            Then select from among its children the option element whose
            *value*-attribute is ``value``. If no matching *value*-attribute
            is found, this will search for an option whose text matches
            ``value``. If the select element's *multiple*-attribute is set,
            then ``value`` can be a list or tuple to select multiple options.
        """
        for (name, value) in data.items():
            select = self.form.find("select", {"name": name})
            if not select:
                raise InvalidFormMethod("No select named " + name)

            # Deselect all options first
            for option in select.find_all("option"):
                if "selected" in option.attrs:
                    del option.attrs["selected"]

            # Wrap individual values in a 1-element tuple.
            # If value is a list/tuple, select must be a <select multiple>.
            if not isinstance(value, list) and not isinstance(value, tuple):
                value = (value,)
            elif "multiple" not in select.attrs:
                raise LinkNotFoundError("Cannot select multiple options!")

            for choice in value:
                option = select.find("option", {"value": choice})

                # try to find with text instead of value
                if not option:
                    option = select.find("option", string=choice)

                if not option:
                    raise LinkNotFoundError(
                        'Option %s not found for select %s' % (choice, name)
                    )

                option.attrs["selected"] = "selected"