Returns the path for the pdf file

        args:
            pdffilename: string
                returns path for the plots folder / pdffilename.pdf

def get_pdffilepath(pdffilename):
        """
        Returns the path for the pdf file

        args:
            pdffilename: string
                returns path for the plots folder / pdffilename.pdf
        """
        return FILEPATHSTR.format(
            root_dir=ROOT_DIR, os_sep=os.sep, os_extsep=os.extsep,
            name=pdffilename,
            folder=PURPOSE.get("plots").get("folder", "plots"),
            ext=PURPOSE.get("plots").get("extension", "pdf")
        )