Python how to plot a frequency pie chart with one column using plotly.express

Question

I have a data frame and I only want to plot the frequency of one column, for example, the count of cars of different brands. Cars: [FORD, FORD, BMW, GMC, GMC, GMC, GMC.....] I want to plot them in pie charts of any suitable graphs, without using matplotlib.

I tried to create pivot tables, which are like Ford: 4, Chevy: 3, BMW: 5, GMC: 10. but I don't know how to access the column labels and I can't use them in plotly.

Answer 1

You can groupby cars and get the counts in a new column count like so

df.groupby(['cars'])['cars'].count().reset_index(name='count')

Then you may use Plotly to render a pie chart like so

import plotly.express as px fig = px.pie(df, values='count', names='cars', title='Cars') fig.show()