go.Marker update problem

Hi All,

When defined in a conditional statement, go.Marker fails to update marker attributes as described. To have a different color (than other markers in trace 3), I had to comment out the respective line.

if len(args) > 9:
        trace4 = go.Scatter(
                          x= args[9],
                          y= args[10],
                          mode='markers',
                          #marker=go.Marker(color='rgb(107,174,214)'),
                          xaxis='x1',
                          yaxis='y2',
                          name= 'Outliers',
                          text= args[11],
                          hoverinfo= 'all'
                          )
    else:
        trace4 = []

Am I not allowed to do such thing in the first place, or am I missing something?

Best, Agah

[agahkarakuzu]

@cldougl Thank you so much! Although brackets around args[] did not solved my issue, casting the trace data in the conditional statement similar to the remaining did the trick.

My take home message from this issue: Data type should be uniform among traces to be appended 😃

I wish us Montrealers a warm weekend (I guess this would be the best wish)!

[cldougl]

Thanks- I’m not able to run through that whole notebook (typically it’s easiest to determine the bug with a simplified example that’s based on dummy data rather than a user dataset).

Modifying the code you pasted above, you should be able to run:

import plotly.offline as off
import plotly.graph_objs as go

args = [0, 1, 2, 3, 4, 5]
args_T4 = [0, 1, 2, 3, 4, 5, 6, 7]

def generate_traces(args):
    trace0 = go.Scatter(x= [args[0]],
                        y= [args[1]],
                        mode='markers',
                        marker=go.Marker(color='blue', size=8))
    trace1 = go.Scatter(x= [args[2]],
                        y= [args[3]],
                        mode='markers',
                        marker=go.Marker(color='blue', size=8))
    trace2 = go.Scatter(x= [args[4]],
                        y= [args[5]],
                        mode='markers',
                        marker=go.Marker(color='blue', size=8))
    if len(args) > 6:
        trace3 = go.Scatter(x= [args[6]],
                            y= [args[7]],
                            mode='markers',
                            marker=go.Marker(color='pink', size=8))
    else:
        trace3 = {}
    
    data = [trace0, trace1, trace2, trace3]
    
    return data

data_T4 = generate_traces(args_T4)
off.plot(data_T4)

Here is a notebook comparing the 2 dummy datasets: https://plot.ly/~chelsea_lyn/16834

If you’re still having an issue with your example feel free to check out and post in our community forum!