Percentage labels in Matplotlib - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add percentage labels to the pie chart.

Matplotlib

import matplotlib.pyplot as plt
sizes = [30, 45, 25]
labels = ['A', 'B', 'C']
plt.pie(sizes, labels=labels, autopct=[1])
plt.show()

Drag options to blanks, or click blank then click option'

A'%.1f%%'

B'%s%%'

C'%d%%'

D'%f%%'

Attempts:

3 left

💡 Hint

Common Mistakes

Using '%d%%' which shows no decimal places.

Forgetting to include the percent sign '%%' in the format string.

The autopct parameter formats the percentage labels. '%.1f%%' shows one decimal place.

2fill in blank

medium

Complete the code to display percentage labels with one decimal place on the pie chart.

Matplotlib

import matplotlib.pyplot as plt
sizes = [10, 20, 70]
labels = ['X', 'Y', 'Z']
plt.pie(sizes, labels=labels, autopct=[1])
plt.show()

Drag options to blanks, or click blank then click option'

A'%d%%'

B'%s%%'

C'%.2f%%'

D'%.1f%%'

Attempts:

3 left

💡 Hint

Common Mistakes

Using '%d%%' which shows no decimals.

Using '%s%%' which is not a valid number format.

Using '%.1f%%' formats the percentage with one decimal place, which is clear and common for pie charts.

3fill in blank

hard

Fix the error in the code to correctly show percentage labels on the pie chart.

Matplotlib

import matplotlib.pyplot as plt
sizes = [40, 35, 25]
labels = ['Red', 'Blue', 'Green']
plt.pie(sizes, labels=labels, autopct=[1])
plt.show()

Drag options to blanks, or click blank then click option'

A'%.1f%%'

B'%1.f%%'

C'%.1f%'

D'%f%%'

Attempts:

3 left

💡 Hint

Common Mistakes

Using '%1.f%%' which is invalid format.

Using '%.1f%' which misses escaping the percent sign.

The correct format string is '%.1f%%'. It shows one decimal place and includes the percent sign properly escaped.

4fill in blank

hard

Fill both blanks to create a pie chart with percentage labels showing two decimals and a shadow effect.

Matplotlib

import matplotlib.pyplot as plt
sizes = [50, 30, 20]
labels = ['Apple', 'Banana', 'Cherry']
plt.pie(sizes, labels=[1], autopct=[2], shadow=True)
plt.show()

Drag options to blanks, or click blank then click option'

Alabels

B['Apple', 'Banana', 'Cherry']

C'%.2f%%'

D'%.1f%%'

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the variable name 'labels' instead of the list.

Using '%.1f%%' instead of '%.2f%%' for two decimals.

Use the list of labels for the labels parameter and '%.2f%%' to show percentages with two decimals.

5fill in blank

hard

Fill all three blanks to create a pie chart with exploded slices, percentage labels with no decimals, and a start angle of 90 degrees.

Matplotlib

import matplotlib.pyplot as plt
sizes = [15, 25, 60]
labels = ['Cat', 'Dog', 'Rabbit']
explode = ([1], [2], [3])
plt.pie(sizes, labels=labels, autopct='%d%%', explode=explode, startangle=90)
plt.show()

Drag options to blanks, or click blank then click option'

A0.1

B0

C0.2

D0.3

Attempts:

3 left

💡 Hint

Common Mistakes

Using integers instead of floats for explode values.

Not matching the length of explode tuple to the number of slices.

The explode tuple controls how far each slice is separated. Here, the first slice is exploded by 0.3, the second not exploded (0), and the third by 0.1.