短划线加载布局

Question

当我想编译代码时，我得到这个错误，它本身所做的就是从mysql中的数据库中获取数据，然后将它们放在温度计图中，但是当要编译时，我得到了这个错误： >

“加载布局时出错”

这是te代码：

external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']

app = dash.Dash(__name__)

dataSQL = []

sql_conn = MySQLdb.connect('localhost', 'root', 'root', 'DB')
cursor = sql_conn.cursor()
cursor.execute("SELECT value FROM sensorParser where sensor='TC'")
#and timestamp >= timestamp()-4seg"
rows = cursor.fetchall()
for row in rows:
    dataSQL.append(list(row))
    labels = ['value']
    df = pd.DataFrame.from_records(dataSQL, columns=labels)

app.layout = html.Div([
    daq.Thermometer(
        id='my-thermometer',
        value=5,
        min=0,
        max=10,
        style={
            'margin-bottom': '5%'
        }
    ),

    dcc.Slider(
        id='thermometer-slider',
        value=5,
        min=0,
        max=10,

    ),
    html.Div(daq.Thermometer(min=-5,max=105,value=df['value'],size=350,label='TEMPERATURA',
    labelPosition='top',color='orange',showCurrentValue=True,units="°C"),className="six columns"),dcc.Interval(id='graph-update3',interval=1000, n_intervals=0),
])


@app.callback(
    dash.dependencies.Output('my-thermometer', 'value'),
    [dash.dependencies.Input('thermometer-slider', 'value')])
def update_thermometer(value):
    return value


if __name__ == '__main__':
    app.run_server(debug=True) 

致谢。