Exploding slices in Matplotlib - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a pie chart with one slice exploded.

Matplotlib

import matplotlib.pyplot as plt
sizes = [30, 20, 50]
explode = [[1], 0, 0]
plt.pie(sizes, explode=explode)
plt.show()

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

A1

B0.1

CTrue

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Using True instead of a float value.

Using 1 which explodes the slice too far.

Using None which causes an error.

The explode list controls how far each slice is offset from the center. Using 0.1 for the first slice explodes it slightly.

2fill in blank

medium

Complete the code to explode the second slice in the pie chart.

Matplotlib

import matplotlib.pyplot as plt
sizes = [10, 40, 50]
explode = [0, [1], 0]
plt.pie(sizes, explode=explode)
plt.show()

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

A0.2

B0

C1

DTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 which does not explode the slice.

Using True which is not a valid float.

Using 1 which explodes the slice too far.

Setting the second value in explode to 0.2 offsets the second slice slightly from the center.

3fill in blank

hard

Fix the error in the explode list to correctly explode the third slice.

Matplotlib

import matplotlib.pyplot as plt
sizes = [25, 25, 50]
explode = [0, 0, [1]]
plt.pie(sizes, explode=explode)
plt.show()

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

ATrue

B'0.3'

C0.3

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string like '0.3' which causes a type error.

Using True which is not a valid float.

Using None which causes an error.

The explode value must be a float, not a string or boolean. 0.3 correctly explodes the third slice.

4fill in blank

hard

Fill both blanks to explode the first and third slices in the pie chart.

Matplotlib

import matplotlib.pyplot as plt
sizes = [15, 35, 50]
explode = [[1], 0, [2]]
plt.pie(sizes, explode=explode)
plt.show()

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

A0.15

B0

C0.25

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 which does not explode the slice.

Using 1 which explodes the slice too far.

Using 0.15 and 0.25 explodes the first and third slices slightly and moderately, respectively.

5fill in blank

hard

Fill all three blanks to explode the first and third slices and set labels for the pie chart.

Matplotlib

import matplotlib.pyplot as plt
sizes = [20, 30, 50]
labels = [[1], 'B', [2]]
explode = [[3], 0, 0]
plt.pie(sizes, labels=labels, explode=explode)
plt.show()

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

A'A'

B'C'

C0.1

D'D'

Attempts:

3 left

💡 Hint

Common Mistakes

Using numbers instead of strings for labels.

Not exploding any slice by using 0.

Using incorrect label names.

Labels 'A' and 'C' are set for the first and third slices. Exploding the first slice by 0.1 offsets it slightly.

Practice

1. What does the explode parameter do in a matplotlib pie chart?

easy

A. It adds labels to the slices.

B. It changes the colors of the slices.

C. It rotates the entire pie chart.

D. It pulls slices out from the pie to highlight them.

Solution

1. Step 1: Understand the role of explode

   The explode parameter is used to offset slices from the center of the pie chart.

2. Step 2: Identify the effect on the pie chart

   This makes the selected slices stand out by pulling them out slightly.

3. Final Answer:

   It pulls slices out from the pie to highlight them. -> Option D

4. Quick Check:

   Exploding slices = pull out slices [OK]

Hint: Explode means pull slices out to highlight [OK]

Common Mistakes:

• Thinking explode changes colors
• Confusing explode with labels
• Assuming explode rotates the pie

2. Which of the following is the correct way to explode the first slice in a pie chart using matplotlib?

easy

A. explode = 0.1

B. explode = [0.1, 0, 0, 0]

C. explode = (0, 0.1, 0, 0)

D. explode = [1, 1, 1, 1]

Solution

1. Step 1: Understand explode format

   The explode parameter expects a list or tuple with one float per slice.

2. Step 2: Identify correct explode for first slice

   To explode only the first slice, set first value > 0 and others 0, so (0.1, 0, 0, 0) or [0.1, 0, 0, 0] is correct.

3. Final Answer:

   explode = (0, 0.1, 0, 0) -> Option C

4. Quick Check:

   Tuple with first >0, rest 0 = explode first slice [OK]

Hint: Use tuple or list with 0.1 for slice to explode [OK]

Common Mistakes:

• Using a single float instead of list or tuple
• Exploding wrong slice by wrong index
• Using all ones explodes all slices

3. What will be the output of this code snippet?

import matplotlib.pyplot as plt
sizes = [30, 20, 25, 25]
explode = [0, 0.2, 0, 0]
plt.pie(sizes, explode=explode, labels=['A', 'B', 'C', 'D'])
plt.show()

medium

A. No slices will be pulled out.

B. The second slice labeled 'B' will be pulled out from the pie.

C. All slices will be pulled out equally.

D. The first slice labeled 'A' will be pulled out from the pie.

Solution

1. Step 1: Analyze the explode list

   The explode list is [0, 0.2, 0, 0], so only the second slice has a positive offset.

2. Step 2: Match explode to labels

   The second slice corresponds to label 'B', so only 'B' will be pulled out.

3. Final Answer:

   The second slice labeled 'B' will be pulled out from the pie. -> Option B

4. Quick Check:

   explode[1] = 0.2 pulls out slice 'B' [OK]

Hint: Check explode list index matching slice label [OK]

Common Mistakes:

• Assuming first slice explodes by default
• Thinking all slices explode with one positive value
• Ignoring explode parameter effect

4. Identify the error in this pie chart code that tries to explode the third slice:

import matplotlib.pyplot as plt
sizes = [10, 20, 30]
explode = [0, 0, 0.1, 0]
plt.pie(sizes, explode=explode)
plt.show()

medium

A. The explode list has more elements than sizes.

B. The explode list has fewer elements than sizes.

C. The explode values must be integers, not floats.

D. The sizes list must be sorted.

Solution

1. Step 1: Compare lengths of sizes and explode

   The sizes list has 3 elements, but explode has 4 elements.

2. Step 2: Understand explode length requirement

   Explode must have the same length as sizes to match each slice.

3. Final Answer:

   The explode list has more elements than sizes. -> Option A

4. Quick Check:

   explode length ≠ sizes length causes error [OK]

Hint: Explode list length must match sizes length [OK]

Common Mistakes:

• Using different lengths for explode and sizes
• Thinking explode values must be integers
• Sorting sizes is unnecessary

5. You want to highlight the largest slice in a pie chart by exploding it. Given sizes = [15, 40, 25, 20], which explode list correctly explodes only the largest slice?

hard

A. [0, 0.1, 0, 0]

B. [0, 0, 0.1, 0]

C. [0.1, 0, 0, 0]

D. [0, 0, 0, 0.1]

Solution

1. Step 1: Identify the largest slice

   The sizes are [15, 40, 25, 20], so the largest slice is the second one with 40.

2. Step 2: Create explode list to highlight largest slice

   Explode list must have 0.1 at index 1 (second slice) and 0 elsewhere: [0, 0.1, 0, 0].

3. Final Answer:

   [0, 0.1, 0, 0] -> Option A

4. Quick Check:

   Largest slice index = 1, explode[1] = 0.1 [OK]

Hint: Find largest slice index, set explode at that index [OK]

Common Mistakes:

• Exploding wrong slice index
• Exploding multiple slices accidentally
• Using explode values > 1