px animations does not show correctly colors if all colors are not in the first frame

For example

import pandas as pd
import plotly.express as px
dataVals = {
    'Lat': [39.783730, 7, 39.783730, 39.783730, 20, -4.03, 39.783730, 36.82, 39.783730],
    'Lon': [-100.445882, 66, -100.445882, -100.445882, 70, 5.33, -100.445882, -1.29, -100.445882],
    'Value': [40, 12, 22, 3, 60, 23, 30, 100, 200],
    'Year': ['1985', '1990', '1990', '1990', '1990', '1990', '2000', '2000', '2000'],
    'Continent Color': ["a", "b", "a", "a", "b", "c", "b", "d", "a"]
    }
data = pd.DataFrame(dataVals)

fig = px.scatter_geo(data, lat="Lat", lon="Lon", size="Value", color="Continent Color",
                     animation_frame="Year", animation_group="Continent Color",
                     projection="natural earth", size_max=200)

fig.show()

(all points are displayed with the color of continent "a"). Reported by https://community.plot.ly/t/scatter-geo-only-shows-values-with-a-certain-color-if-i-have-multiple-years-as-the-same-year/35976. Other functions such as px.scatter have the same problem.

If all colors are used for the first frame, the problem disappears.

Commencez par exécuter l’exemple fourni avec pandas et Plotly Express, puis comparez px.scatter_geo à px.scatter en suivant la manière dont les frames d’animation et les valeurs de couleur sont assemblés. Le travail est terminé lorsque les couleurs introduites après le premier frame sont rendues avec leurs propres couleurs dans les graphiques animés, y compris dans l’exemple signalé.