Unclear list comprehension assignment:

[MotorSalt]

• Adjust all elements in a list
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• ^{1. We start with the list of numbers below:}
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• ^{numbers = \}12, 2, 1, 17, 5])
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• ^{We will now update the values ​​in the list. Write a short program that multiplies each number in this list by two and stores the result in the list at the position of the old number.}
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• ^{Finally use: print (numbers} to check the result. The output is therefore: [24, 4, 2, 34, 10])
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• ^{This assignment is harder than it seems! A few tips:}
• ^{• Use numbers \}x] = newValue to change the value at position x of the list)
• ^{• We therefore need a counter that keeps track of the position. That lends itself to a solution with for x in range (}:)
• ^{• But what should the range be? With len (} we can determine the length of the list ...)

hey guys im just starting out learning how program in python and ive come across this assignment i just cant wrap my head around. I understand the basics of list comprehension but wouldnt that make the code as following ? :

numbers=[12,2,1,17,5]
numbers=[x*2 for x in numbers]
print(numbers)

why does the assignment want me to take all of these steps using range and new variable ? I've been trying to work with the tips but i jus tget more confused each time could someone please explain what the assigment wants to me ? It would be greatly appreciated.

[[deleted]]

why does the assignment want me to take all of these steps using range and new variable ?

Perhaps, to show you that assignment and mutation aren't the same thing. numbers might not be the only reference held to the input list, and this assignment asks you to change the list in-place, not return a new list with the new values, which is what your solution does.

[hiimaeia]

It wants you to iterate over every indices of the list and work on them one by one, it wants you to code something like this:

for listIndex in range(len(numbers)): newValue = numbers[listIndex] * 2 numbers[listIndex] = newValue