for my blog

show_colorscale.py

import plotly.graph_objs as go
from plotly.offline import download_plotlyjs, init_notebook_mode, plot, iplot
import numpy as np
N = 10000
cluster_id = [np.random.randint(N/1000) for val in range(N)]
trace = go.Scattergl(
    x = np.random.randn(N),
    y = np.random.randn(N),
    mode = 'markers',
    marker = dict(
        colorscale='Rainbow',
        color=cluster_id,
        line = dict(
            width = 1,
            color = '#404040')
    )
)
data = [trace]
iplot(data, filename='WebGL100000')