Method insert_element_before

src/pptx/oxml/xmlchemy.py:685–691

(self, elm: ElementBase, *tagnames: str)

        return None

    def insert_element_before(self, elm: ElementBase, *tagnames: str):
        successor = self.first_child_found_in(*tagnames)
        if successor is not None:
            successor.addprevious(elm)
        else:
            self.append(elm)
        return elm

    def remove_all(self, *tagnames: str) -> None:
        """Remove child elements with tagname (e.g. "a:p") in `tagnames`."""