Automatically Pick Colors When Using `add_trace`

📊 Plotly Python
2 
data= pd.read_csv("https://raw.githubusercontent.com/plotly/datasets/master/2014_usa_states.csv")

#create dict with unique color values
color_dict={}
x=0
for postal in data['Postal']:
    if postal not in color_dict:
        color_dict[postal]=x
        x += 1
        
#create color list
color_list=[]
for postal in data['Postal']:
    color_list.append(color_dict[postal])


fig = go.Figure().add_trace(go.Scatter(x=data['Postal'],
                                y=data['Population'],
                                mode='markers',
                                marker_color=color_list,
                                marker_colorscale="Rainbow",
                                text=data['State'])) 

fig.show()