Make an SVG style string from the dictionary. See also _parse_style_str also.

def _make_style_str(styledict):
    """
    Make an SVG style string from the dictionary. See also _parse_style_str also.
    """
    s = ''
    for key in list(styledict.keys()):
        s += "%s:%s;" % (key, styledict[key])
    return s