Named colors and hex codes in Matplotlib - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the line color to a named color 'red' in matplotlib.

Matplotlib

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [4, 5, 6], color='[1]')
plt.show()

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

Acyan

Bred

C#00FF00

Dblue

Attempts:

3 left

💡 Hint

Common Mistakes

Using a hex code instead of a named color when the instruction asks for a named color.

Forgetting to put the color name inside quotes.

The color parameter accepts named colors like 'red'. Here, 'red' sets the line color to red.

2fill in blank

medium

Complete the code to set the marker color using a hex code for green.

Matplotlib

import matplotlib.pyplot as plt
plt.scatter([1, 2, 3], [4, 5, 6], marker='o', color='[1]')
plt.show()

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

Ared

Byellow

Cblue

D#00FF00

Attempts:

3 left

💡 Hint

Common Mistakes

Using a named color instead of a hex code when the instruction asks for a hex code.

Missing the '#' symbol in the hex code.

The hex code '#00FF00' represents green color. Using it sets the marker color to green.

3fill in blank

hard

Fix the error in the code by choosing the correct color format for a blue line.

Matplotlib

import matplotlib.pyplot as plt
plt.plot([1, 2, 3], [3, 2, 1], color=[1])
plt.show()

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

Ablue

B'blue'

C'#0000FF'

D#0000FF

Attempts:

3 left

💡 Hint

Common Mistakes

Passing color without quotes causing a syntax error.

Using named color without quotes.

The color value must be a string. '#0000FF' is the hex code for blue, so it must be inside quotes.

4fill in blank

hard

Fill both blanks to create a dictionary mapping color names to their hex codes.

Matplotlib

colors = {'red': '[1]', 'green': '[2]'}

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

A#FF0000

B#00FF00

Cred

Dgreen

Attempts:

3 left

💡 Hint

Common Mistakes

Using color names instead of hex codes in the dictionary values.

Forgetting quotes around hex codes.

Hex codes for red and green are '#FF0000' and '#00FF00' respectively. They must be strings.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps color names to their uppercase hex codes if the hex code starts with '#'.

Matplotlib

colors = {'red': '#ff0000', 'blue': '#0000ff', 'green': '00ff00'}
result = {k: v[1]() for k, v in colors.items() if v[2]('#')}
print(result)  # Output: [3]

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A.upper

B[0]

C{'red': '#FF0000', 'blue': '#0000FF'}

Dstartswith

Attempts:

3 left

💡 Hint

Common Mistakes

Using indexing [0] instead of startswith to check the first character.

Not calling the upper method with parentheses.

Including colors without '#' in the output.

The comprehension converts hex codes to uppercase using .upper() if the string startswith '#'. The output dictionary includes only those keys.