🔒 List Slicing (Anybody know how to fix this issue????)

[young bane]

tours_data = []
for token in input().split():
    tours_data.append(int(token))

slice_size = len(tours_data)//4
spring_tours = tours_data[-8:2]
summer_tours = tours_data[-6:4]
fall_tours = tours_data[-4:6]
winter_tours = tours_data[-2:]


print(f'Number of tour dates in each season: {slice_size}')
print(f'All year tours: {tours_data}')
print(f'Spring tours: {spring_tours}')
print(f'Summer tours: {summer_tours}')
print(f'Fall tours: {fall_tours}')
print(f'Winter tours: {winter_tours}')```

[calm adder]

@young bane

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[red berry]

i think you're slicing backwards

negative slices refer to the end of the list

ie. -4 means go 4 back from wherever the end of the list is

[young bane]

The program I'm working on gives me multiple inputs

[young bane]

would it work if I wer to just used numbers or number of elements that dont apply to other input/ other set of lists?

[kindred grove]

!slice

[calm adder]

Sequence slicing

Slicing is a way of accessing a part of a sequence by specifying a start, stop, and step. As with normal indexing, negative numbers can be used to count backwards.

Examples

>>> letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g']
>>> letters[2:]  # from element 2 to the end
['c', 'd', 'e', 'f', 'g']
>>> letters[:4]  # up to element 4
['a', 'b', 'c', 'd']
>>> letters[3:5]  # elements 3 and 4 -- the right bound is not included
['d', 'e']
>>> letters[2:-1:2]  # Every other element between 2 and the last
['c', 'e']
>>> letters[::-1]  # The whole list in reverse
['g', 'f', 'e', 'd', 'c', 'b', 'a']
>>> words = "Hello world!"
>>> words[2:7]  # Strings are also sequences
"llo w"

[red berry]

wdym?

[young bane]

my question was confusing lmao im trying to find a better way to ask it

The program I'm working with takes in an input so any input can be given

[red berry]

yes

what im saying is you're slicing the list backwards

[young bane]

but if I sliced from index[0] would it work with all the inputs?

[red berry]

this prints an empty list because you're going from the 4th element from the end (ie. 7) to the 1st element from the start (ie. 1) ```py
L = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(L[-4 : 1])

[young bane]

yeah that makes sense

wait

[red berry]

you cant magically loop back around, that doesnt make sense

(memory wise)

[young bane]

!e
L = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(L[-4 : 1])```

!e py L = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] print(L[-4 : 1])

[calm adder]

@young bane :white_check_mark: Your 3.12 eval job has completed with return code 0.

[]

[young bane]

no yeah that makes sense

I think I see what you mean

[red berry]

you wanna either count backwards by including a step in the slicing, or reverse the numbers

[flint lotus]

you’re hardcoding your solution to work on slice sizes of 2

you compute slice_size but then you don’t use it anywhere, and you do indexing like [-2:]

[calm adder]

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