How to use the openpyxl.shared.xmltools.SubElement function in openpyxl

def _write_serial(self, node, reference, literal=False):
        is_ref = hasattr(reference, 'pos1')
        data_type = reference.data_type
        number_format = getattr(reference, 'number_format')

        mapping = {'n':{'ref':'numRef', 'cache':'numCache'},
                   's':{'ref':'strRef', 'cache':'strCache'}}

        if is_ref:
            ref = SubElement(node, '{%s}%s' %(CHART_NS, mapping[data_type]['ref']))
            SubElement(ref, '{%s}f' % CHART_NS).text = str(reference)
            data = SubElement(ref, '{%s}%s' %(CHART_NS, mapping[data_type]['cache']))
            values = reference.values
        else:
            data = SubElement(node, '{%s}numLit' % CHART_NS)
            values = (1,)

        if data_type == 'n':
            SubElement(data, '{%s}formatCode' % CHART_NS).text = number_format or 'General'

        SubElement(data, '{%s}ptCount' % CHART_NS, {'val':str(len(values))})
        for j, val in enumerate(values):
            point = SubElement(data, '{%s}pt' % CHART_NS, {'idx':str(j)})
            val = safe_string(val)
            SubElement(point, '{%s}v' % CHART_NS).text = val

def _write_style(self, node):
        """ write style theme """

        style = SubElement(node, '{%s}style' % CHART_DRAWING_NS)

        ln_ref = SubElement(style, '{%s}lnRef' % DRAWING_NS, {'idx':'2'})
        scheme_clr = SubElement(ln_ref, '{%s}schemeClr' % DRAWING_NS, {'val':'accent1'})
        SubElement(scheme_clr, '{%s}shade' % DRAWING_NS, {'val':'50000'})

        fill_ref = SubElement(style, '{%s}fillRef' % DRAWING_NS, {'idx':'1'})
        SubElement(fill_ref, '{%s}schemeClr' % DRAWING_NS, {'val':'accent1'})

        effect_ref = SubElement(style, '{%s}effectRef' % DRAWING_NS, {'idx':'0'})
        SubElement(effect_ref, '{%s}schemeClr' % DRAWING_NS, {'val':'accent1'})

        font_ref = SubElement(style, '{%s}fontRef' % DRAWING_NS, {'idx':'minor'})
        SubElement(font_ref, '{%s}schemeClr' % DRAWING_NS, {'val':'lt1'})

def write_rels(self, drawing_id):
        root = Element("{%s}Relationships" % PKG_REL_NS)

        attrs = {'Id' : 'rId1',
            'Type' : '%s/chartUserShapes' % REL_NS,
            'Target' : '../drawings/drawing%s.xml' % drawing_id }
        SubElement(root, '{%s}Relationship' % PKG_REL_NS, attrs)
        return get_document_content(root)

def write(self, shape_id):

        root = Element('{%s}userShapes' % CHART_NS)

        for shape in self._shapes:
            anchor = SubElement(root, '{%s}relSizeAnchor' % CHART_DRAWING_NS)

            xstart, ystart, xend, yend = shape.coordinates

            _from = SubElement(anchor, '{%s}from' % CHART_DRAWING_NS)
            SubElement(_from, '{%s}x' % CHART_DRAWING_NS).text = str(xstart)
            SubElement(_from, '{%s}y' % CHART_DRAWING_NS).text = str(ystart)

            _to = SubElement(anchor, '{%s}to' % CHART_DRAWING_NS)
            SubElement(_to, '{%s}x' % CHART_DRAWING_NS).text = str(xend)
            SubElement(_to, '{%s}y' % CHART_DRAWING_NS).text = str(yend)

            sp = SubElement(anchor, '{%s}sp' % CHART_DRAWING_NS, {'macro':'', 'textlink':''})
            nvspr = SubElement(sp, '{%s}nvSpPr' % CHART_DRAWING_NS)
            SubElement(nvspr, '{%s}cNvPr' % CHART_DRAWING_NS, {'id':str(shape_id), 'name':'shape %s' % shape_id})
            SubElement(nvspr, '{%s}cNvSpPr' % CHART_DRAWING_NS)

            sppr = SubElement(sp, '{%s}spPr' % CHART_DRAWING_NS)
            frm = SubElement(sppr, '{%s}xfrm' % DRAWING_NS,)
            # no transformation
            SubElement(frm, '{%s}off' % DRAWING_NS, {'x':'0', 'y':'0'})
            SubElement(frm, '{%s}ext' % DRAWING_NS, {'cx':'0', 'cy':'0'})

            prstgeom = SubElement(sppr, '{%s}prstGeom' % DRAWING_NS, {'prst':str(shape.style)})
            SubElement(prstgeom, '{%s}avLst' % DRAWING_NS)

            fill = SubElement(sppr, '{%s}solidFill' % DRAWING_NS, )

attrs = {
            "id": "_x0000_s%s" % (idx+1026),
            "type": "#_x0000_t202",
            "style": "position:absolute; margin-left:59.25pt;margin-top:1.5pt;width:108pt;height:59.25pt;z-index:1;visibility:hidden",
            "fillcolor": "#ffffe1",
            "{%s}insetmode" % officens: "auto"
        }
        shape = SubElement(root, "{%s}shape" % vmlns, attrs)

        SubElement(shape, "{%s}fill" % vmlns, {"color2":"#ffffe1"})
        SubElement(shape, "{%s}shadow" % vmlns, {"color":"black", "obscured":"t"})
        SubElement(shape, "{%s}path" % vmlns, {"{%s}connecttype"%officens:"none"})
        textbox = SubElement(shape, "{%s}textbox" % vmlns, {"style":"mso-direction-alt:auto"})
        SubElement(textbox, "div", {"style": "text-align:left"})
        client_data = SubElement(shape, "{%s}ClientData" % excelns, {"ObjectType": "Note"})
        SubElement(client_data, "{%s}MoveWithCells" % excelns)
        SubElement(client_data, "{%s}SizeWithCells" % excelns)
        SubElement(client_data, "{%s}AutoFill" % excelns).text = "False"
        SubElement(client_data, "{%s}Row" % excelns).text = str(row)
        SubElement(client_data, "{%s}Column" % excelns).text = str(column)

blipfill = SubElement(pic, '{%s}blipFill' % SHEET_DRAWING_NS)
        SubElement(blipfill, '{%s}blip' % DRAWING_NS, {
            '{%s}embed' % REL_NS: 'rId%s' % idx,
            'cstate':'print'
        })
        SubElement(blipfill, '{%s}srcRect' % DRAWING_NS)
        stretch = SubElement(blipfill, '{%s}stretch' % DRAWING_NS)
        SubElement(stretch, '{%s}fillRect' % DRAWING_NS)

        sppr = SubElement(pic, '{%s}spPr' % SHEET_DRAWING_NS, {'bwMode':'auto'})
        frm = SubElement(sppr, '{%s}xfrm' % DRAWING_NS)
        # no transformation
        SubElement(frm, '{%s}off' % DRAWING_NS, {'x':'0', 'y':'0'})
        SubElement(frm, '{%s}ext' % DRAWING_NS, {'cx':'0', 'cy':'0'})
        prstGeom = SubElement(sppr, '{%s}prstGeom' % DRAWING_NS, {'prst':'rect'})
        SubElement(prstGeom, '{%s}avLst' % DRAWING_NS)

        SubElement(sppr, '{%s}noFill' % DRAWING_NS)

        ln = SubElement(sppr, '{%s}ln' % DRAWING_NS, {'w':'1'})
        SubElement(ln, '{%s}noFill' % DRAWING_NS)
        SubElement(ln, '{%s}miter' % DRAWING_NS, {'lim':'800000'})
        SubElement(ln, '{%s}headEnd' % DRAWING_NS)
        SubElement(ln, '{%s}tailEnd' % DRAWING_NS, {'type':'none', 'w':'med', 'len':'med'})
        SubElement(sppr, '{%s}effectLst' % DRAWING_NS)

        SubElement(anchor, '{%s}clientData' % SHEET_DRAWING_NS)

def _write_series_labels(self, node, serie):
        cat = SubElement(node, '{%s}cat' % CHART_NS)
        self._write_serial(cat, serie.labels)

def _write_axis_title(self, axis, ax):

        if axis.title != '':
            title = SubElement(ax, '{%s}title' % CHART_NS)
            tx = SubElement(title, '{%s}tx' % CHART_NS)
            rich = SubElement(tx, '{%s}rich' % CHART_NS)
            SubElement(rich, '{%s}bodyPr' % DRAWING_NS)
            SubElement(rich, '{%s}lstStyle' % DRAWING_NS)
            p = SubElement(rich, '{%s}p' % DRAWING_NS)
            pPr = SubElement(p, '{%s}pPr' % DRAWING_NS)
            SubElement(pPr, '{%s}defRPr' % DRAWING_NS)
            r = SubElement(p, '{%s}r' % DRAWING_NS)
            SubElement(r, '{%s}rPr' % DRAWING_NS, {'lang':self.chart.lang})
            t = SubElement(r, '{%s}t' % DRAWING_NS).text = axis.title
            SubElement(title, '{%s}layout' % CHART_NS)

cNvPicPr = SubElement(name, '{%s}cNvPicPr' % SHEET_DRAWING_NS)
        paras = {"noChangeAspect": "0"}
        if img.nochangeaspect:
            paras["noChangeAspect"] = "1"
        if img.nochangearrowheads:
            paras["noChangeArrowheads"] = "1"

        SubElement(cNvPicPr, '{%s}picLocks' % DRAWING_NS, paras)

        blipfill = SubElement(pic, '{%s}blipFill' % SHEET_DRAWING_NS)
        SubElement(blipfill, '{%s}blip' % DRAWING_NS, {
            '{%s}embed' % REL_NS: 'rId%s' % idx,
            'cstate':'print'
        })
        SubElement(blipfill, '{%s}srcRect' % DRAWING_NS)
        stretch = SubElement(blipfill, '{%s}stretch' % DRAWING_NS)
        SubElement(stretch, '{%s}fillRect' % DRAWING_NS)

        sppr = SubElement(pic, '{%s}spPr' % SHEET_DRAWING_NS, {'bwMode':'auto'})
        frm = SubElement(sppr, '{%s}xfrm' % DRAWING_NS)
        # no transformation
        SubElement(frm, '{%s}off' % DRAWING_NS, {'x':'0', 'y':'0'})
        SubElement(frm, '{%s}ext' % DRAWING_NS, {'cx':'0', 'cy':'0'})
        prstGeom = SubElement(sppr, '{%s}prstGeom' % DRAWING_NS, {'prst':'rect'})
        SubElement(prstGeom, '{%s}avLst' % DRAWING_NS)

        SubElement(sppr, '{%s}noFill' % DRAWING_NS)

        ln = SubElement(sppr, '{%s}ln' % DRAWING_NS, {'w':'1'})
        SubElement(ln, '{%s}noFill' % DRAWING_NS)
        SubElement(ln, '{%s}miter' % DRAWING_NS, {'lim':'800000'})
        SubElement(ln, '{%s}headEnd' % DRAWING_NS)

def _write_axis_title(self, axis, ax):

        if axis.title != '':
            title = SubElement(ax, '{%s}title' % CHART_NS)
            tx = SubElement(title, '{%s}tx' % CHART_NS)
            rich = SubElement(tx, '{%s}rich' % CHART_NS)
            SubElement(rich, '{%s}bodyPr' % DRAWING_NS)
            SubElement(rich, '{%s}lstStyle' % DRAWING_NS)
            p = SubElement(rich, '{%s}p' % DRAWING_NS)
            pPr = SubElement(p, '{%s}pPr' % DRAWING_NS)
            SubElement(pPr, '{%s}defRPr' % DRAWING_NS)
            r = SubElement(p, '{%s}r' % DRAWING_NS)
            SubElement(r, '{%s}rPr' % DRAWING_NS, {'lang':self.chart.lang})
            t = SubElement(r, '{%s}t' % DRAWING_NS).text = axis.title
            SubElement(title, '{%s}layout' % CHART_NS)