What does the following code do:

my_list = [1, 2, 3, 4, 5]

new_list = my_list[1:4]

print(new_list)

Question

What does the following code do:

my_list = [1, 2, 3, 4, 5]

new_list = my_list[1:4]

print(new_list)

BlackTom AI · Accepted Answer

Question restatement: What does the following code do?

my_list = [1, 2, 3, 4, 5]

new_list = my_list[1:4]

print(new_list)

Now, let's evaluate each answer option one by one.

Option 1: Creates a new list [1, 2, 3].
- This is incorrect because Python slicing my_list[1:4] starts at index 1 (the second element, which is 2) and goes up to but does not include index 4. Therefore the elements in the resulting slice are 2, 3, and 4, not 1, 2, 3. The presence of 1 at the start shows that the slice did not begin at index 0, so this option misstates the starting point.

Option 2: Creates a new list [2, 4, 6].
- This is incorrect because slicing does not skip elements or multiply them. It simply takes a contiguous subsequence of the list. The values in the original list are 1, 2, 3, 4, 5; there is no 6, and the slice [1:4] yields consecutive elements, not a pattern like 2, 4, 6. This option confuses slicing with a step or transformation that isn’t present here.

Option 3: Creates a new list [1, 4, 5].
- This is incorrect for the same reason: the slice starts at index 1 and ends before index 4, so it would pick elements 2, 3, and 4. The values 1, 4, and 5 do not correspond to that slice. The result would never include the first element (1) when starting at index 1, so this option misrepresents the slice boundaries.

Option 4: Creates a new list [2, 3, 4].
- This is correct. In Python, my_list[1:4] selects elements from index 1 up to, but not including, index 4. The indices map to values: index 1 -> 2, index 2 -> 3, index 3 -> 4. Hence the resulting list is [2, 3, 4], which is exactly what the print statement outputs when executed.

Note on slicing mechanics:
- The general rule is list[start:end] includes elements with indices from start up to end-1.
- The start index is inclusive, while the end index is exclusive.
- If start is omitted, it defaults to 0; if end is omitted, it goes to the end of the list. In this example, start is 1 and end is 4, yielding three elements: 2, 3, and 4.

SP25: CS-174 Sec 02 - Server Web Prog Final- Requires Respondus LockDown Browser

What does the following code do: my_list = [1, 2, 3, 4, 5] new_list = my_list[1:4] print(new_list)

查看解析

登录即可查看完整答案

类似问题

What is output by the following code segment? values = ["Q", "W", "E", "R", "T", "Y"] print(values[2 : 4])

Consider the following code segment: x = [5, 3, 7, 9, 1] y = x[3 : ] print(y) What is displayed when it executes?

What statement regarding the use of lists is accurate?

Given that: my_list = [42, 'Life, the Universe, and Everything', 'A duck', 3.14159] What value does this expression reduce to: my_list[:2] Do not forget to use the correct notation! As an example. strings have 'quotes' and floats have decimal points ...

a=[3, 2, 1, 'hello', [10, -10], 5, 6] Which code snippet below will return this output?: ['hello', [10, -10]]

Given the list sodas = ['Coke', 'Pepsi', 'Root Beer', 'Sprite', 'Mountain Dew'] which code below will return ['Coke', 'Pepsi', 'Root Beer']?

Given the list: numbers = [5, 10, 15, 20, 25, 30] Which slice operator extracts the following three elements? [15, 20, 25]

Consider the following code segment: x = [5, 3, 7, 9, 1] y = x[2 : 4] print(y) What is displayed when it executes?

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单