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Exercise 2

Without running this code, what will it print? Why?

set1 = {42, 'Monty Python', ('a', 'b', 'c')}
set2 = set1
set1.add(range(5, 10))
print(set2)

Don't worry about having an exact match for the output. The important part is to show something that accurately represents set2.

Solution

The code outputs:

# The order of the elements probably won't match,
# but the 4 elements shown here should all be
# present in your answer.

{('a', 'b', 'c'), 'Monty Python', 42, range(5, 10)}

This result demonstrates that set1 and set2 reference the same set: if we add an element to set1, we'll see that element when we look at set2. The opposite is true, too: if we add something to set2, we'll see it in set1.

This code also demonstrates that assigning a variable to another variable doesn't create a new object. Instead, Python copies a reference from the original variable (set1) into the target variable (set2).

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