labelsOutside is not a function type error

[AnishSN]

I am getting below error in javascript on rendering a pie chart
Uncaught TypeError: this.chart.x(...).y(...).showLabels(...).labelType(...).showLegend(...).labelsOutside is not a function

code:

col = OrderedDict([
("Floors", {"label": "Floors"})
])
df = pd.read_csv("fitbit_data.csv")

pc=PieChart(col,df["Floor"], init_params={},chart_id="piechart", url="/piechart/", colors=[],label_type="percent")
ui.add_chart(pc)

......