Batch Convert PNG to SVG (python 3.x)

pngtosvg.py

import os
import base64

def main():
    startSvgTag = """<?xml version="1.0" encoding="UTF-8" standalone="no"?>
    <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
    "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
    <svg version="1.1"
    xmlns="http://www.w3.org/2000/svg"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    width="240px" height="240px" viewBox="0 0 240 240">"""

    endSvgTag = """</svg>"""
    for files in os.listdir("."):
        if files.endswith(".png"):
            pngFile = open(files, 'rb')
            base64data = base64.b64encode(pngFile.read()).decode("utf8").replace('\n','')
            base64String = '<image xlink:href="data:image/png;base64,{0}" width="240" height="240" x="0" y="0" />'.format(base64data)

            f = open(os.path.splitext(files)[0]+".svg","w")
            f.write( startSvgTag + base64String + endSvgTag)
            print("Converted " + files + " to " + os.path.splitext(files)[0]+".svg")
            
if __name__ == "__main__":
    main()