Python Coding Challange - Question With Answer(01251224)

 

What does this code output?

numbers = range(3)
output = {numbers}
print(output)

Options:

1. TypeError

2. {range(0, 3)}

3. {[0, 1, 2]}

4. {0, 1, 2}

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Step 1: Create a range object

numbers = range(3)

• The range(3) function creates a range object representing the numbers $0, 1, 2$.
• However, the variable numbers stores the range object itself, not the list of numbers.

For example:

print(numbers)  # Output: range(0, 3)

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Step 2: Attempt to create a set

output = {numbers}

• The {} braces are used to create a set.
• When you add the numbers variable to a set, you are not unpacking the elements of the range. Instead, the entire range object is added to the set as a single item.
• Sets store unique elements, and here the range object itself is treated as an immutable, unique object.

Result:

output = {range(0, 3)}

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Step 3: Print the set

print(output)

When you print the set:

{range(0, 3)}

This output indicates that the set contains a single element, which is the range object.

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Key Points:

1. Range object: The range(3) creates a range object that represents the numbers $0, 1, 2$. It does not directly create a list or tuple of these numbers.
2. Set behavior: Adding numbers to the set {} adds the range object as a single element, not its individual values.
3. Unpacking: If you want to add the elements $0, 1, 2$ individually to the set, you would need to unpack the range using *numbers.

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Modified Example:

If you want the numbers themselves to appear in the set, use:

output = {*numbers}
print(output)

This will output:

{0, 1, 2}

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Output for Original Code:

{range(0, 3)}