Python: Print Out A Set Containing All The Colors From A List Which Are ...

Python: Print out a set containing all the colors from a list which are not present in other list

Last update on May 17 2025 05:43:47 (UTC/GMT +8 hours)

Unique Colors Finder

Write a Python program that prints out all colors from color_list_1 that are not present in color_list_2.

Test Data: color_list_1 = set(["White", "Black", "Red"]) color_list_2 = set(["Red", "Green"]) Expected Output : {'Black', 'White'}

Pictorial Presentation:

Sample Solution-1:

Python Code:

# Create two sets, color_list_1 and color_list_2. color_list_1 = set(["White", "Black", "Red"]) color_list_2 = set(["Red", "Green"]) # Print the original elements of the sets. print("Original set elements:") print(color_list_1) print(color_list_2) # Calculate and print the difference of color_list_1 and color_list_2. print("\nDifference of color_list_1 and color_list_2:") print(color_list_1.difference(color_list_2)) # Calculate and print the difference of color_list_2 and color_list_1. print("\nDifference of color_list_2 and color_list_1:") print(color_list_2.difference(color_list_1))

Sample Output:

Original set elements: {'White', 'Black', 'Red'} {'Green', 'Red'} Differenct of color_list_1 and color_list_2: {'White', 'Black'} Differenct of color_list_2 and color_list_1: {'Green'}

Explanation:

The said code defines two sets called "color_list_1" and "color_list_2" containing string elements.

The elements of both sets are then printed.

After that, it uses the difference() method on "color_list_1" and passes "color_list_2" as an argument to it. This method returns the elements that are in the "color_list_1" but not in "color_list_2".

Again it uses the difference() method on "color_list_2" and passes "color_list_1" as an argument to it. This method returns the elements that are in the "color_list_2" but not in "color_list_1".

The output of the code will be:

Differenct of color_list_1 and color_list_2:

Original set elements:

{'Red', 'White', 'Black'}

{'Red', 'Green'}

{'White', 'Black'}

Differenct of color_list_2 and color_list_1:

{'Green'}

Sample Solution-2:

Python Code:

# Create two sets, color_list_1 and color_list_2. color_list_1 = set(["White", "Black", "Red"]) color_list_2 = set(["Red", "Green"]) # Print the original elements of the sets. print("Original set elements:") print(color_list_1) print(color_list_2) # Calculate and print the difference of color_list_1 and color_list_2 using set difference (-) operator. print("\nDifference of color_list_1 and color_list_2:") print(color_list_1 - color_list_2) # Calculate and print the difference of color_list_2 and color_list_1 using set difference (-) operator. print("\nDifference of color_list_2 and color_list_1:") print(color_list_2 - color_list_1) class="samp-out">Sample Output:

Original set elements: {'Red', 'Black', 'White'} {'Red', 'Green'} Differenct of color_list_1 and color_list_2: {'Black', 'White'} Differenct of color_list_2 and color_list_1: {'Green'}

Explanation:

The said code defines two sets, "color_list_1" and "color_list_2", with the initial elements "White", "Black", "Red" and "Red", "Green" respectively.

It then prints the original sets, followed by the difference between color_list_1 and color_list_2 (the elements in color_list_1 that are not in color_list_2) and the difference between color_list_2 and color_list_1 (the elements in color_list_2 that are not in color_list_1).

Here the "-" operator is used to get the difference between two sets.

For more Practice: Solve these Related Problems:

• Write a Python program to find all colors present in color_list_2 but not in color_list_1.
• Write a script that finds common colors in two given sets.
• Write a Python function that returns the symmetric difference between two sets of colors.
• Write a program to merge two sets of colors and remove duplicates before displaying the result.

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