How to pass RGB tuples to `px.bar`?-CodePudding

You need

Here's what I did so far:

import plotly.express as px

df = pd.read_parquet('so_sample.parquet')
df = df.groupby(['col1', 'col2']).size().reset_index(name='count')
px.bar(
    df,
    x='col1',
    y='count',
    color='col2',
).show()

I tried passing color_discrete_sequence=[color1, color2, ...] and it doesn't make any difference.

CodePudding user response：

The data format used in matplotlib is wide format, but in plotly it is long format. plotly should be the same wide format and you can specify your favorite colormap. I chose Dark24, which has a large number of colors.

import plotly.express as px
import pandas as pd

df = pd.read_parquet('./data/so_sample.parquet')
#df = df.groupby(['col1', 'col2']).size().reset_index(name='count')
df = df.groupby(['col1', 'col2']).size().unstack().fillna(0)

px.bar(
    df,
    x=df.index,
    y=df.columns.tolist(),
    color_discrete_sequence=px.colors.qualitative.Dark24,
).show()