import plotly.graph_objects as go

# convert date column to datetime
data['time'] = pd.to_datetime(data['time'])

# format date column to quarterly periods
data['date_quarterly'] = data['time'].dt.to_period('Q').astype(str)

periods = data['date_quarterly'].tolist()

# calculate topic activity over time
act = model.topic_activity_over_time(periods)

# visualize topic activity
fig = model.visualize_topic_activity(top_n=8, topic_activity=act, time_slices=periods)

# update legend to display only the topic number
fig.data = sorted(fig.data, key=lambda trace: trace.name)

for trace in fig.data:
    trace.name = trace.name[0]

# update the layout
fig.update_layout(
    width=1200,
    height=600,
    title='',
    legend_title_text='Topic',
    xaxis_tickangle=45         # set x-axis labels to 45-degree angle
)

# show the figure
fig.show()