How to hide legend selectively in a plotly line plot?

Question

I'm struggling to hide the legend for some but not all of the lines in my line plot. Here is what the plot looks like now.

Plot:

Essentially I want to hide the legend for the light grey lines while keeping it in place for the coloured lines.

Here's my code:

import plotly.graph_objects as go

fig = go.Figure()
fig.update_layout(autosize=False, width=800, height=500, template='none')
fig.update_layout(title = 'Title', xaxis_title = 'Games', yaxis_title = 'Profit')

for team in rest_teams:
    fig.add_traces(go.Scatter(x=df['x'], y = df[team], name = team, line = {'color': '#F5F5F5'}))

for team in big_eight:
    line_dict = {'color': cmap[team]}
    fig.add_traces(go.Scatter(x=df['x'], y = df[team], name = team, line = line_dict))

fig.show()

I can update layout with

fig.update_layout(showlegend=False)

which hides the whole thing and isn't optimal. Help would be appreciated.

Answer 1

If I understand your desired output correctly, you can use showlegend = False for the traces where you've set a grey color with color = #F5F5F5:

for c in cols1:
    fig.add_trace(go.Scatter(x = df.index, y = df[c], line_color = '#F5F5F5',
                  showlegend = False))

And then leave that out for the lines you'd like colors assigned to, and make sure to include name = c in:

for c in cols2:
    fig.add_trace(go.Scatter(x = df.index, y = df[c], 
                  name = c))

Plot:

Complete code:

import plotly.graph_objects as go
import plotly.express as px
import pandas as pd


df = px.data.stocks()
df = df.set_index('date')

fig = go.Figure()

cols1 = df.columns[:2]
cols2 = df.columns[2:]

for c in cols1:
    fig.add_trace(go.Scatter(x = df.index, y = df[c], line_color = '#F5F5F5',
                  showlegend = False))

for c in cols2:
    fig.add_trace(go.Scatter(x = df.index, y = df[c], 
                  name = c))
fig.update_layout(template=template
fig.show()