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.

Please provide enough code so others can better understand or reproduce the problem. — Community
– Community Bot, Commented Jul 4, 2022 at 16:49

Sanidhya Singh · Accepted Answer · 2022-10-13 10:27:11Z

3

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

df = 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()

edited Oct 13, 2022 at 10:27

answered Jul 4, 2022 at 6:01

Sanidhya Singh

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1 Comment

Anna Madsen Over a year ago

I had to save the new DataFrame into a separate variable, which I then used for my pie chart, but then it worked. Great, thank you!

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