def define_font_attributes(fill='black', stroke='black', stroke_width=0,
    font_family='Verdana'):
    """
    Define font attributes
    
    Keyword arguments:
    fill -- fill - default 'black'
    stroke -- stroke - default 'black'
    stroke_width -- stroke width - default 0
    font_family -- font family - default 'Verdana'
    """
    global FONT_ATTR
    FONT_ATTR = {'fill': fill, 'stroke': stroke, 'stroke_width':
        stroke_width, 'font_family': font_family}
    return
