🔒 Explain string operations...

[timber glade]

It really doesn't make sense to me, and when astring = "Hello world!" but then when print(astring[3:7]) happens, I don't understand why you would get lo w

[woeful elbow]

@timber glade

Python help channel opened

Remember to:

• Ask your Python question, not if you can ask or if there's an expert who can help.
• Show a code sample as text (rather than a screenshot) and the error message, if you've got one.
• Explain what you expect to happen and what actually happens.

:warning: Do not pip install anything that isn't related to your question, especially if asked to over DMs.

Closes after a period of inactivity, or when you send !close.

[leaden carbon]

what do you think it should be?

[timber glade]

I really dont understand it so, l o

[leaden carbon]

do you know what [3:7] does?

[timber glade]

starts at 3 stops at 7

[leaden carbon]

yes, but the stop is "exclusive"

meaning that index will not be included

so we get whatever is in index 3, 4, 5, 6

l o w

[timber glade]

ok thanks!

[leaden carbon]

!e

astring = "Hello world!"
print(*[i % 10 for i in range(len(astring))])
print(*astring)

[woeful elbow]

:white_check_mark: Your 3.13 eval job has completed with return code 0.

001 | 0 1 2 3 4 5 6 7 8 9 0 1
002 | H e l l o   w o r l d !

[leaden carbon]

these are the index positions of the string

I wrapped it around for 10 and 11 just so it would line up properly

[timber glade]

yeah lo w makes sense now

I dont understand this one though:

# Length should be 20
print("Length of s = %d" % len(s))

# First occurrence of "a" should be at index 8
print("The first occurrence of the letter a = %d" % s.index("a"))

# Number of a's should be 2
print("a occurs %d times" % s.count("a"))

# Slicing the string into bits
print("The first five characters are '%s'" % s[:5]) # Start to 5
print("The next five characters are '%s'" % s[5:10]) # 5 to 10
print("The thirteenth character is '%s'" % s[12]) # Just number 12
print("The characters with odd index are '%s'" %s[1::2]) #(0-based indexing)
print("The last five characters are '%s'" % s[-5:]) # 5th-from-last to end

# Convert everything to uppercase
print("String in uppercase: %s" % s.upper())

# Convert everything to lowercase
print("String in lowercase: %s" % s.lower())

# Check how a string starts
if s.startswith("Str"):
    print("String starts with 'Str'. Good!")

# Check how a string ends
if s.endswith("ome!"):
    print("String ends with 'ome!'. Good!")

# Split the string into three separate strings,
# each containing only a word
print("Split the words of the string: %s" % s.split(" "))```

[woeful elbow]

Hey @timber glade!

Please edit your message to use a code block

Add a py after the three backticks.

```py
print('Hello, world!')
```

This will result in the following:

print('Hello, world!')```

[leaden carbon]

There's a lot here. What specifically are you referring to?

Code is best understood broken down 1 line at a time

[timber glade]

for s; im supposed to change it to the correct string

[leaden carbon]

This seems more like a puzzle that you have to work out based on what the expected result is

[timber glade]

Yeah

https://learnpython.org/en/Basic_String_Operations

[leaden carbon]

So what have you tried so far?

[timber glade]

All I've done is change the string into 20 characters like this:
"Hey there! what shou"

I honestly dont know what im doing

[leaden carbon]

Well there's definitely clues scattered throughout the code

like what the first 3 characters and last 4 characters should be

and the character in index 8 should be a

and the string should be 3 words

[timber glade]

how do you know that...

[leaden carbon]

# First occurrence of "a" should be at index 8
print("The first occurrence of the letter a = %d" % s.index("a"))

It says it

[timber glade]

I think I just need to learn the concept of strings...

[leaden carbon]

a string is just a collection of text characters

[timber glade]

But like, the tuples!!

[leaden carbon]

what do tuples have to do with strings?

[timber glade]

like these things %d

[leaden carbon]

those are for string formatting

using % to do it is actually a very old-school method

no one really uses that anymore

!e

name = 'zEE'

print("Hello my name is %s" % name)

[woeful elbow]

:white_check_mark: Your 3.13 eval job has completed with return code 0.

Hello my name is zEE

[leaden carbon]

it simply lets you replace part of the string with a variable

so the %s becomes name

[timber glade]

I thought python was supposed to be easy 😦

[leaden carbon]

What about that are you unsure of?

Also easy is relative

[timber glade]

the start stop rest stuff

and that dumb excerise

[leaden carbon]

just because the exercise is dumb doesn't mean python is hard

you're going to find good and bad learning material

bad learning material will make things seem harder to learn

[timber glade]

is brocode bad material

[leaden carbon]

I'm not sure, I've never used it

[timber glade]

is learnpython.org bad material

[leaden carbon]

Also this was just because you didn't understand what was happening

[leaden carbon]

I'm not sure either, but it might be a bit outdated if they're using % for string formatting

[timber glade]

Interesing...

now it's conditions so i think im fine >:D

[leaden carbon]

but it's good that you're asking questions about the material

that's a good way to learn

[timber glade]

🙂

also whats a in operator

like ```if name in````

[leaden carbon]

in lets you check for "membership"

so if you want to know if a string contains a specific letter or word

!e

sentence = 'hello nice to meet you'

if 'nice' in sentence:
    print("aww")

[woeful elbow]

:white_check_mark: Your 3.13 eval job has completed with return code 0.

aww

[timber glade]

is it like

print("Hi John or Rick!")```

[leaden carbon]

no, == will compare the entire string

in is used for searching within the string

[leaden carbon]

this was True because nice was found inside the sentence

[timber glade]

Then what's this?

if name in ["John", "Rick"]:
    print("Your name is either John or Rick.")```

[leaden carbon]

my example above was using in on a string, which looks for a "substring"

but using in on a list will check for a member of the list

so this is checking if name is either John or Rick

[leaden carbon]

this is the equivalent

[timber glade]

that makes sense 😄

[leaden carbon]

!e

letters = 'abcdef'

if 'e' in letters:
    print("e is found")

[woeful elbow]

:white_check_mark: Your 3.13 eval job has completed with return code 0.

e is found

[timber glade]

Ok

[leaden carbon]

suits = ['hearts', 'diamonds', 'spades', 'clubs']
choice = input("What suit would you like to play?")

if choice in suits:
    print("Very well!")
else:
    print("Not valid!")

[timber glade]

How come they did x == 2 instead of x = 2 here?

if x == 2:
    print("x equals two!")
else:
    print("x does not equal to two.")```

[woeful elbow]

Hey @timber glade!

Please edit your message to use a code block

Add a py after the three backticks.

```py
print('Hello, world!')
```

This will result in the following:

print('Hello, world!')```

[leaden carbon]

== is always used for comparison

and = is always used for assignment

[timber glade]

ok

[leaden carbon]

they mean different things

[timber glade]

y = [1,2,3]
print(x == y) # Prints out True
print(x is y) # Prints out False```
Hows x is y false, they look exactly the same!!

[leaden carbon]

== and is are not the same thing

== is "equality". If the 2 things are equal

is checks if two objects are the same object

this concept starts to get a bit more advanced

but even though x and y hold the same numbers, they're still different lists

if I append to x, y will not change

[timber glade]

so like x = 1
y = x
so y is x is true?

[leaden carbon]

This is where the concept of is can be quite complicated. Not all datatypes behave this way

[timber glade]

😦

[leaden carbon]

!e

x = (1,2,3)
y = (1,2,3)
print(x == y) # Prints out True
print(x is y) # Prints out False

[woeful elbow]

:white_check_mark: Your 3.13 eval job has completed with return code 0.

001 | True
002 | True

[timber glade]

huh

[leaden carbon]

using your example above, is will be True with tuples

https://nedbatchelder.com/text/names.html

I really recommend this article

it will clear up a lot of things

[timber glade]

for x in range(5):
    print(x)

# Prints out 3,4,5
for x in range(3, 6):
    print(x)

# Prints out 3,5,7
for x in range(3, 8, 2):
    print(x))``` how does this print out 3,5,7?

[leaden carbon]

the 3rd number in the range is the "step"

so it's counting from 3 to 8, by 2s

3, 5, 7

[timber glade]

[heavy elk]

3 = 3
3 + 2 = 5
3 + 2 + 2 = 7
3 + 2 + 2 +2 is more than 8, so this one doesnt count and you stop

[timber glade]

Also, what in the world is this?

count = 0
while True:
    print(count)
    count += 1
    if count >= 5:
        break

# Prints out only odd numbers - 1,3,5,7,9
for x in range(10):
    # Check if x is even
    if x % 2 == 0:
        continue
    print(x)```

[woeful elbow]

Hey @timber glade!

Please edit your message to use a code block

Add a py after the three backticks.

```py
print('Hello, world!')
```

This will result in the following:

print('Hello, world!')```

[heavy elk]

which part

[timber glade]

the 2nd

[heavy elk]

which part of it is confusing

[timber glade]

oh wait isnt continuing skipping the number

[heavy elk]

continue skips the current iteration yes

[timber glade]

nvm i got it

[leaden carbon]

things won't make sense until they do

[heavy elk]

so true

[timber glade]

Where are they looping with else?

while(count<5):
    print(count)
    count +=1
else:
    print("count value reached %d" %(count))

# Prints out 1,2,3,4
for i in range(1, 10):
    if(i%5==0):
        break
    print(i)
else:
    print("this is not printed because for loop is terminated because of break but not due to fail in condition")```

[leaden carbon]

for/else is a pretty unique scenario that isn't used too often

[heavy elk]

for/else and while/else are super niche

[leaden carbon]

the else only runs if the loop finishes without breaking

[timber glade]

like crashing?

[heavy elk]

break

[leaden carbon]

it can be useful if you're searching for something in a list

and you want to know whether or not it was found

[heavy elk]

if it crashed the code wouldnt continue at all

[leaden carbon]

break exits from a loop

[timber glade]

whats the i%5 for too

[leaden carbon]

% is "modulo"

it performs remainder division

[heavy elk]

its arbitrary to demonstrate the use of for/else

its saying if the current number is divisible by 5, break

[leaden carbon]

if the result of modulo is 0, it means the number divided evenly into the other

[heavy elk]

and thereby show the use of for/else

[timber glade]

remainders...

[heavy elk]

what about em

[timber glade]

so 5/5 is 0 since its divisible

[leaden carbon]

yes

but 6/5 would have 1 leftover

[heavy elk]

for a % b you take the closest multiple of b that's less than a and then the result is whatever is left over

[leaden carbon]

!e

for i in range(10):
    print(i % 3)

[woeful elbow]

:white_check_mark: Your 3.13 eval job has completed with return code 0.

001 | 0
002 | 1
003 | 2
004 | 0
005 | 1
006 | 2
007 | 0
008 | 1
009 | 2
010 | 0

[leaden carbon]

it's incredibly useful to wrap things around

[heavy elk]

^ yes, anything "cyclical" will use modulo

[leaden carbon]

let's say I'm playing Monopoly with 4 friends and the game is on "turn 47"

I can quickly find out whose turn it is by getting the remainder of 47 % 4

[timber glade]

    951, 402, 984, 651, 360, 69, 408, 319, 601, 485, 980, 507, 725, 547, 544,
    615, 83, 165, 141, 501, 263, 617, 865, 575, 219, 390, 984, 592, 236, 105, 942, 941,
    386, 462, 47, 418, 907, 344, 236, 375, 823, 566, 597, 978, 328, 615, 953, 345,
    399, 162, 758, 219, 918, 237, 412, 566, 826, 248, 866, 950, 626, 949, 687, 217,
    815, 67, 104, 58, 512, 24, 892, 894, 767, 553, 81, 379, 843, 831, 445, 742, 717,
    958, 609, 842, 451, 688, 753, 854, 685, 93, 857, 440, 380, 126, 721, 328, 753, 470,
    743, 527
]

# your code goes here
for number in numbers:``` 
I'm supposed to stop the code after 237 and this is the solution:
```numbers = [
    951, 402, 984, 651, 360, 69, 408, 319, 601, 485, 980, 507, 725, 547, 544,
    615, 83, 165, 141, 501, 263, 617, 865, 575, 219, 390, 984, 592, 236, 105, 942, 941,
    386, 462, 47, 418, 907, 344, 236, 375, 823, 566, 597, 978, 328, 615, 953, 345,
    399, 162, 758, 219, 918, 237, 412, 566, 826, 248, 866, 950, 626, 949, 687, 217,
    815, 67, 104, 58, 512, 24, 892, 894, 767, 553, 81, 379, 843, 831, 445, 742, 717,
    958, 609, 842, 451, 688, 753, 854, 685, 93, 857, 440, 380, 126, 721, 328, 753, 470,
    743, 527
]

# your code goes here
for number in numbers:
    if number == 237:
        break

    if number % 2 == 1:
        continue```
How?!?!

[leaden carbon]

players = ['jim', 'sally', 'ron', 'timmy']
turn = 47

current_player = players[turn % len(players)]

[heavy elk]

i dont know what the point of the second if statement is

it does exactly nothing

[leaden carbon]

what about it are you unsure of?

[timber glade]

Why is if number % 2 ==1: continue
is there

[leaden carbon]

there's also nothing being printed so there's no meaningful output

[leaden carbon]

just to confuse you

[heavy elk]

.

[timber glade]

So nothing?

[heavy elk]

yes

[timber glade]

😠

[heavy elk]

lol

[timber glade]

I don't like this website

[leaden carbon]

seeing bad code and understanding that it's bad is still helpful

[timber glade]

But, how am I supposed to know if it's bad without the pros showing me...

[leaden carbon]

experiment

put that code in an editor and run it

change the part you're curious about and observe results

print() will be your best friend to better understand what's happening

print everything

I still do, 7 years later

[heavy elk]

dont second guess yourself. you saw the second if statement and intuited that it did nothing but asked us anyway

first, maybe try to rationalize it yourself

dont just say "that feels wrong" explain why it is

if you can't, thats when you ask

but always at least try

[timber glade]

ok

[leaden carbon]

python will tell you very quickly if things are right or wrong

[heavy elk]

☹️ you've been doing this the same amount of time as me and you are this much smarter? demoralizing

[leaden carbon]

Who says I'm smarter?

today I asked chatgpt how to use github

[timber glade]

What year was it when you "knew" python?

[heavy elk]

i guess this is confirmation bias but i have seen many questions you have been able to answer that i have not but not the other way round

[leaden carbon]

Hard to say. Learning "the language" and learning "what you can do with the language" are two different things

[leaden carbon]

Yeah, I don't chime in on things way above me

[heavy elk]

i dont think it even takes a year to reach full comfort with a single language, conversely if you mean "knew" programming i dont think there exists a person who can say that entirely

[leaden carbon]

I don't really touch questions about discord.py, numpy, pandas, ML, etc

[timber glade]

did you use python with combobreakers?

[leaden carbon]

combo breakers?

do you mean Combo Devils?

[heavy elk]

what do you mean by this

[timber glade]

oops

combo devils

combobreakers is the tournament

[leaden carbon]

the team is actually there right now hosting a booth 😉

but yes, I built our asset pipeline with python

[timber glade]

whats that

[leaden carbon]

We need a seamless way to manage all of our assets, animations, characters, etc

[timber glade]

i literally only know pygame and love2d 😭

[leaden carbon]

Our artists/animators work in Autodesk Maya

Let's say they do an animation with Character A. We need a way to send their work into the game engine and hook it up

[timber glade]

like a data compiler?

isnt that for Java

[leaden carbon]

nothing to do with compiling

1 sec, let me open maya 😉

Let's say an animator does a 3 hit combo that we want in the game

[timber glade]

woa

[leaden carbon]

We actually need these sliced up into 3 separate files for gameplay reasons

[timber glade]

Did they do that in SF?

also do you guys use C++

or C

or C#

[leaden carbon]

This is a custom tool I built for our animators

It lets them create animation clips from a single animation scene

[timber glade]

this is python?

[leaden carbon]

This will properly name, categorize, tag, etc

[timber glade]

looks like java to me

[leaden carbon]

so they just need to hit the export button and all the correct data gets sent to the game engine

[heavy elk]

any language can do anything any other language can do

[leaden carbon]

Yes

[heavy elk]

you can't tell what something was made with from visuals

you can even write this in pure math, theoretically

[timber glade]

you cant tell if somethings from C++?

[heavy elk]

wouldnt be able to tell

no not at all

its all different ways of doing the same thing

[leaden carbon]

Yes, the game is in Unity, which is C++ C#

[timber glade]

C++ is so hard anyways, why does it take so long to draw a triangular prism 😭

[heavy elk]

it all gets compiled to the same ones and zeroes

[heavy elk]

isnt unity C#

i thought unreal was C++

[leaden carbon]

lol yes sorry, mistyped

[heavy elk]

lol

[timber glade]

fortnite engine 🤩

one day i wanna make a game

[leaden carbon]

but yes, this is just one example of tools we can create to improve the workflow of our artists

I have all sorts of things to improve the lives of the animators

a library tool for loading in past work

a transfer tool to batch copy an animation from one character to another

[heavy elk]

making a game would be cool but i am too much of a perfectionist to even start

[timber glade]

that seems real hard

[leaden carbon]

It can be, but I was smart about how I set up our pipeline. We reuse character skeletons within the cast

which makes it easier to transfer animations from one to another

[timber glade]

your devs are 🧠

[leaden carbon]

I also build the control rigs for our characters

[timber glade]

whats a control rig

is it also in python?

[leaden carbon]

I use python to automate some of the processes

but it's all done in Maya

a control rig lets an animator interact with the model

[timber glade]

One day i wanna be as smart as you

[leaden carbon]

when we create a model, we create it in "A-pose"

[timber glade]

Maya seems interesting

[leaden carbon]

but it's basically a statue, it has no flexibility

I build the skeleton that drives the model

[heavy elk]

i used Maya in high school, i did not realize how tedious modeling / texturing is

[leaden carbon]

and the control rig for interacting with the skeleton

If I go into X-Ray mode, we can see the skeleton inside

[timber glade]

why not blender

[leaden carbon]

maya is industry standard, it's what everyone on the team uses in their work

[timber glade]

even like

fall guys?!?

[leaden carbon]

every major game studio uses maya

[timber glade]

😮

[leaden carbon]

I'm not sure what they used

many games do use blender

[timber glade]

they used unity

[leaden carbon]

but it's often hobbyists who learned it on their own

most schools will teach Maya since that's what's mainly used in the industry

[leaden carbon]

that doesn't necessarily mean maya or blender was used

[timber glade]

Interesintg..

[leaden carbon]

but also yeah, it took me years to develop these skills

I started out with very basic scripts

[woeful elbow]

Python help channel closed for inactivity

This help channel has been closed. Feel free to create a new post in #1035199133436354600. To maximize your chances of getting a response, check out this guide on asking good questions.