如何控制 plotly 条形图中的彩条重复？

Question

I have created a plotted bar chart with Plotly where I noticed that colours are repeated when bars are above 10. I want to have control over this when the length of the x-axis is more than 10, pass a list of colours to be used. There are two orange, two purple, two sky blue, two blue, etc..

This is the code

df = common_helpers.get_dataframe_in_period(df, options)
if "All" not in options["clinic_nurse"]:
   df = df[df["nurse_name"].isin(options["clinic_nurse"])]
per = df.index_date.dt.to_period(options["groupby"]).astype(str)
count = df.pivot_table(
        index=per, columns="nurse_name", values="patient_count", aggfunc="sum"
    ).fillna(0)
    data = []
for col in count.columns:
        data.append(go.Bar(name=col, x=count.index, y=count[col]))
fig = go.Figure(data)

Answer 1

By default, plotly has up to 10 colors. But you can control and set your favorite color sequency, for example, in px bar parameters by adding:

color_discrete_sequence=px.colors.qualitative.Dark24

I guess that, if you use go.bar it's possible to use the same trick. Check out this source to find the color sequences with plotly.

https://plotly.com/python/discrete-color/

Answer 2

I've found the solution and did it finally. Just import plotly.io which will help you modify the main Plotly colours list and append it to whatever number of colours you want to have

import plotly.io as pio
plotly_template = pio.templates["plotly"]
pio.templates["draft"] = plotly_template
additional_colors = ("#ff057e", "#690f54", "#bf6524", "#176b15")
basic_colors = pio.templates["draft"]["layout"]["colorway"]
pio.templates["draft"]["layout"]["colorway"] = basic_colors + additional_colors