Python snippet that assembles a shields.io badge with a custom SVG icon.

shields_example.py

baseurl = ("https://img.shields.io/badge/{subj}-{status}-{color}.svg"
                   "?style={style}"
                   "&link={link}&link={link}"  # left/+right links
                   "&logo={logo}")
opts = {...}
...
curr_dir = os.path.dirname(os.path.abspath(__file__))
        icon_path = os.path.join(curr_dir, 'static', 'fonts', 'icons', 'style-guide-icons-indiv', 'mail.svg')
        with open(name=icon_path) as icon:
            s = "data:image/svg+xml;base64," + base64.b64encode(icon.read())
        opts['logo'] = urllib.quote(s)