Barchart with benchmark lines

📊 Plotly Python
1

I am trying to create a horizontal barchart similar to the following image.

barchart
barchart956×358 16.9 KB

The small black vertical lines that appear on each bar, correspond to the number of ‘Total Mentions Volume’ for a previous period. I have tried building it with plotly with the following code.

def create_lines(sentiment, mentions2):
    """Creates a line that corresponds to the number of mentions during the previous period"""
    y = {'Negative': 1.7, 'Neutral':0.7, 'Positive':-0.3}
    line = dict(type="line",
                 x0=mentions2,
                 y0=y[sentiment],
                 x1=mentions2,
                 y1=y[sentiment]+0.6,
                 line=dict(
                     color="#706e6e",
                     width=2,
                     # dash="dashdot",
                 ))

    return line

def create_barchart():
    sentiments = ['Positive','Neutral', 'Negative']
    # number of mentions this period
    mentions1 = [120,80, 10]
    # number of mentions the previous period
    mentions2 = [80, 90, 15]
    #create a list of shapes by calling the function create_shapes() for each sentiment
    shapes = []
    i = 0
    for sentiment in sentiments:
        shapes.append(create_lines(sentiment, mentions2[i]))
        i += 1

    layout = dict(
                showlegend=False,
                height=130,

                xaxis=dict(showgrid=True, visible=True, title='Total Mention Volume'),
                yaxis=dict(showgrid=False),
                #plot_bgcolor='white',
                margin=dict(t=20,
                            b=30,
                            l=60,
                            r=20,
                            ),
                shapes= shapes
                )

    graph = dcc.Graph(
                id='sentiment_bar_plot',
                figure={
                    'data': [
                                go.Bar(x= mentions1,
                                       y=sentiments,
                                       orientation='h',
                                       width=[0.5, 0.5, 0.5],
                                       opacity=1,
                                       marker_color=['#04b568', '#bfbdbd', '#fc0000'],
                                       ),

                            ],
                    'layout': layout
                },
                config=config
            )
    return graph

The above code produces the following chart.
barchart2

I also tried using a second set of bars and “barmode= ‘overlay’” but I couldn’t achieve the desired result. Is there a more simple way to build a similar barchart in plotly?