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Problem in running Dash DatePickerRange with Graph

I am new to Python programming. I am trying to add a date range to my graph using DatePickerRange in Dash but it doesn't seem to work. The following message is displayed every time I click on the link:

enter image description here

My data frame is in the following format: Date (index, YYYY-MM-DD), Machine, Start Time (YYYY-MM-DD HH-MM-SS), Parameter 1, Parameter 2

My inputs are: start date, end date, parameter (from drop down).

Output: line graph for the specified date range with "Parameter" on the y-axis, "Start Time" on the x-axis, legend="Machine"

datatypes: Start Time: datetime64[ns] Parameter: int64 Machine: object

I have tried plotting without DatePickerRange and it seems to work fine. Somehow, with DatePickerRange my inputs are not being read.

I am not sure what I am doing wrong. I've provided part of the code below. Any help will be greatly appreciated!

app = dash.Dash(__name__)

app.layout = html.Div([
dcc.DatePickerRange(
    id='my-date-picker-range',
    calendar_orientation='horizontal',
    day_size=39,
    end_date_placeholder_text='End Date',
    with_portal=False,
    first_day_of_week=1,
    reopen_calendar_on_clear=True,
    is_RTL=False,
    clearable=True,
    number_of_months_shown=1,
    min_date_allowed=dt(2022, 1, 1).date(),
    max_date_allowed=dt(2022, 3, 17).date(),
    initial_visible_month=dt(2022, 1, 1).date(),
    start_date=dt(2022, 1, 1).date(),
    end_date=dt(2022, 2, 17).date(),
    display_format='MMM Do, YY',
    month_format='MMMM, YYYY',
    minimum_nights=2,

    persistence=True,
    persisted_props=['start_date'],
    persistence_type='session',

    updatemode='bothdates'
),

html.H1("Machine Parameter Tracker"),

dcc.Dropdown(id='Parameter',
             options=[{'label': x, 'value': x} for x in column_list],
             value={}),
dcc.Graph(id='my-graph', figure={})
])

@app.callback(
    Output(component_id='my-graph', component_property='figure'),
    [Input(component_id='my-date-picker-range', component_property='start_date'),
     Input(component_id='my_date_picker_range', component_property='end_date'),
     Input(component_id='Parameter', component_property='value')]
)
def interactive_graphing(start_date, end_date, value_parameter):
    print(value_parameter)
    print(start_date)
    print(end_date)

    dff = df.loc[start_date:end_date]
    print(dff)

    dff2 = pd.DataFrame()
    dff2['Start Time'] = dff['Start Time']
    dff2['Machine'] = dff['Machine']
    dff2['Parameter'] = dff[value_parameter]
    fig = px.line(dff2, x='Start Time', y='Parameter', color='Machine')
    return fig

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


source https://stackoverflow.com/questions/71679036/problem-in-running-dash-datepickerrange-with-graph

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