🔒 printing the wrong thing..? | Python | Page 1

past quartzBOT Jul 3, 2024, 2:17 PM

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@magic aurora

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magic aurora Jul 3, 2024, 2:18 PM

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im a beginner btw

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fruits = ["apple", "banana", "orange"]
print(fruits)

print(fruits[1])```

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hmm making it 0 seems to work

fallow swallow Jul 3, 2024, 2:20 PM

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yeah 0 is the first index

zenith ember Jul 3, 2024, 2:20 PM

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yeah, in programming you count from 0 up

magic aurora Jul 3, 2024, 2:21 PM

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idk in lua its 1

fallow swallow Jul 3, 2024, 2:21 PM

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0, 1,2, 3

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orange would be index 2

magic aurora Jul 3, 2024, 2:23 PM

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luas index are better
cuz 0 is the placeholder for nothing
basically nil

fallow swallow Jul 3, 2024, 2:23 PM

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i dont know lua

bleak frigate Jul 3, 2024, 2:24 PM

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But this is python, and we have something similar. None

fallow swallow Jul 3, 2024, 2:24 PM

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but most of the time they count by 0

magic aurora Jul 3, 2024, 2:24 PM

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:o

sturdy cosmos Jul 3, 2024, 2:24 PM

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0 is because it's the offset from the first element

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so array[0] means offset 0 from first item which means first item

magic aurora Jul 3, 2024, 2:25 PM

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so it calculates the offset to first item instead of counting the items

sturdy cosmos Jul 3, 2024, 2:25 PM

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It was because of how C designed it from a pointer

sturdy cosmos Jul 3, 2024, 2:25 PM

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magic aurora so it calculates the offset to first item instead of counting the items

Yes

bleak frigate Jul 3, 2024, 2:25 PM

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-1 wraps it around to the end of the list bc of this as well

magic aurora Jul 3, 2024, 2:25 PM

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i hope i get used to this cuz i cant use lua if i want to get a job later

sturdy cosmos Jul 3, 2024, 2:26 PM

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Most programming languages use this offset system as well, so I'd say getting used to it is better in the longer term

winged crescent Jul 3, 2024, 2:27 PM

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I think over 70% of the programming languages start with 0 because of how binary works. Correct me if I'm wrong 😅

fallow swallow Jul 3, 2024, 2:27 PM

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yeah I would say that

magic aurora Jul 3, 2024, 2:27 PM

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do they use none instead of nil too

fallow swallow Jul 3, 2024, 2:28 PM

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in python None I would say is equal to nil

sharp crescent Jul 3, 2024, 2:28 PM

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nil and None are essentially the same, yes

fallow swallow Jul 3, 2024, 2:28 PM

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in python you also dont need to specify the type of a variable

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has its disadvantage but also an advantage

magic aurora Jul 3, 2024, 2:29 PM

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thats a downside for me

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i like writing something before the variables it makes it easier to read imo

bleak frigate Jul 3, 2024, 2:29 PM

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You can specify the type, it’s just not going to throw an error if you change its type

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Var: int = 20

sharp crescent Jul 3, 2024, 2:30 PM

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type annotations are primarily for IDEs, they will yell at you if you type things wrong

sturdy cosmos Jul 3, 2024, 2:30 PM

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There are tools to help you with it, pylint is famous for checking typehinting for you

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There are also tricks to check during runtime, but generally it's not worth the effort - it's more of a design problem

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Python has a huge advantage and that's its development speed

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Not having to define static type is a boon and a problem at the same time, but if you pick python for the speed of development, it's a boon

fallow swallow Jul 3, 2024, 2:31 PM

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yeah of course I say it because in other programming language maybe you need char a = ... long number = .....

magic aurora Jul 3, 2024, 2:32 PM

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luaify

fallow swallow Jul 3, 2024, 2:32 PM

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the interpreter does define the types I guess

sturdy cosmos Jul 3, 2024, 2:33 PM

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The interperter will "guess" the type based on what you do, for example

number_str = input(...)
number = int(number_str)  # interpreter will guess this is an int```

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The type will be defined much later when it's being translated

fallow swallow Jul 3, 2024, 2:34 PM

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ok yeah thats why many people say python is very slow from what I heard

magic aurora Jul 3, 2024, 2:34 PM

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what if the user inputs a string

fallow swallow Jul 3, 2024, 2:34 PM

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input returns a string

magic aurora Jul 3, 2024, 2:35 PM

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it says int(number_str) tho

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isnt integer whole numbers

sturdy cosmos Jul 3, 2024, 2:35 PM

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It will raise a ValueError if you call int() on a string that's not convertible

fallow swallow Jul 3, 2024, 2:35 PM

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input returns a string

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you can check that on ide

sturdy cosmos Jul 3, 2024, 2:35 PM

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fallow swallow ok yeah thats why many people say python is very slow from what I heard

python is slow, but that's when it comes to extreme computing and/or IO heavy tasks

fallow swallow Jul 3, 2024, 2:35 PM

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--> str

sturdy cosmos Jul 3, 2024, 2:36 PM

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For better or worse, if it comes to that you might have picked the wrong tool for the job

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But there are always ways to improve performance, I'll worry about it least

sturdy cosmos Jul 3, 2024, 2:36 PM

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magic aurora isnt integer whole numbers

number_str is the name I give to the value given back from input() - to signify that it's indeed a string and not a number yet

fallow swallow Jul 3, 2024, 2:37 PM

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yeah of course python good for beginners cause C is really close to assembly

sturdy cosmos Jul 3, 2024, 2:37 PM

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python is a high level programming language, which means you do not have to worry about low level concepts like managing pointers / memory usage/address

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For beginners these concepts are very hard to understand at first

fallow swallow Jul 3, 2024, 2:38 PM

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yeah thats it but keep in mind high needs to translate to low

wanton moat Jul 3, 2024, 3:01 PM

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The reason indexes start from 0 is because it's actually a memory offset.

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so you're doing memory_location + (index * object_size)

past quartzBOT Jul 3, 2024, 3:32 PM

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Python help channel closed

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🔒 printing the wrong thing..?

#🔒 printing the wrong thing..?