import io
import cairosvg
from PyPDF2 import PdfFileWriter, PdfFileReader
import xml.etree.ElementTree as ET
from xml2svg import XML2SVG
import svgwrite

svg_path = 'image.svg'
png_path = 'image.png'
pdf_path = 'image.pdf'

pdf_writer = PdfFileWriter()

_unit = svgwrite.Unit('mm')

svg_page = svgwrite.Drawing(size=(_unit(50), _unit(50)))

tree = ET.parse(svg_path)

et_tag = ET.fromstring(tree)

svg_tag = XML2SVG(et_tag)

svg_page.add(svg_tag)

pdf_writer.addPage(PdfFileReader(io.BytesIO(cairosvg.svg2pdf(bytestring=svg_page.tostring()))).getPage(0))

with open('./' + pdf_path, 'x+b') as out:
    pdf_writer.write(out)