python pandas读取Excel数据后用plotly画图

import pandas as pd
import plotly.offline as py
import plotly.graph_objs as go

def chart():
    excelFile = r'test.xlsx'
    df_excel = pd.DataFrame(pd.read_excel(excelFile, orient='index')).sort_index()
    print (df_excel)
    data = []
    trace = go.Scatter(
        x=df_excel['百分比'],
        y=df_excel['值']
    )
    data.append(trace)
    layout = go.Layout(
        xaxis={'title': '百分比'},
        yaxis={'title': '值'}
    )

    fig = go.Figure(data=data, layout=layout)
    py.plot(fig, filename='./test.html', auto_open=False)
chart()