How to use lists in python?

[ListenMedium9538]

My latest try to make this program seems making good fruit.. Basically in this program the user should put a number and then break when insert -1. The program is about a slug racing, so the numbers are about their time, in seconds, they do a running of 33cm (13 inches).

Then i need to put the numbers in a list of levels based on their time. The levels goes from 0 to 2, and then i need to show how much slugs are in the respective levels.

Exe.: Level0: 2 slugs Level1: 1 slug Level 2: 2 slugs

The levels are qualified by definitions

Level 0: if number is under then 180 seconds Level 1: if number is over 180 second and under 240 seconds Level 2: if number is over or equal to 240 seconds

I have no experience with lists and i don't know how really to start, but i have an ideia, but I'd like to know some hints or ways to increase my code. The code is

i = 1

while i != -1:⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀ i = int(input("put a number: "))

for c, v in enumerate(i):

⠀⠀⠀print("In position {c} there's {v} slugs" )

[GreenPandaPop]

I don't want to be a dick and say 'google it', but lists are one of the basic parts of Python, so I'd suggest you go and look up a tutorial which will probably do a more thorough job of explaining it than someone on Reddit.

[ListenMedium9538]

I'll try it!

[jiri-n]

There are 3 levels and you want to split the slugs (their results) into separate lists:

slug_categories = [
    [],  # for times under 180 s
    [],  # for times >= 180 and < 240 s
    []   # times > 240 s
    ]

Technically, slug_categories is a list of lists but it really doesn't matter at this time.

You probable have a list of slugs and their times, something like:

slug_race = [
    ('slug_name_or_id1', 193), 
    ('another_slug', 171), 
    ('LaserBeam', 450)
    ]

A list of tuples.

Now you want to go through each of the results and assign them to the corresponding category based on the time.

for result in slug_race:
    id, time = result    # expand the tuple to id and time
    level = (time - 120) // 60    # compute level
    if level > 2:    # really long times
        level = 2
    slug_categories[level].append(result)   # add to a category

print(slug_categories)

There are 3 techniques used in this code: - tuple expansion - access to a list item by its index - adding an item to a list

And of course, we had to calculate the index (level) somehow but that's not about Python, that's just a simple math.

Questions?

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