Hands-on exercise – Sets

Put the lesson Sets into practice by writing a program yourself.

Exercise field

Compare two steels

The problem

Two steel samples were analysed for the elements they contain. Use set operations to compare them.

Sets have no order, so wrap results in sorted() to print them alphabetically.

Your program should

Print the elements found in both steels.
Print the elements found only in steel A.
Print how many different elements appear across both steels.

Expected output

In both: ['C', 'Fe']
Only in steel A: ['Cr', 'Ni']
Different elements in total: 5

Your solution

Write your program below and press Run. Each run is checked against the expected output.

main.py

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Output

Press Run to see what your program prints.

Need help?

One possible solution. Other programs that print the same output are correct too.

solution.py

steel_a = {"Fe", "C", "Cr", "Ni"}steel_b = {"Fe", "C", "Mn"}print("In both:", sorted(steel_a & steel_b))print("Only in steel A:", sorted(steel_a - steel_b))print("Different elements in total:", len(steel_a | steel_b))

Output

In both: ['C', 'Fe'] Only in steel A: ['Cr', 'Ni'] Different elements in total: 5