[String interpolation]Inconsistent behavior?

[Martin]

I'm loosing my sanity trying to understand this one!
I create a small script as below (complete script attached):

***********************
define Values_used = ["aaaa", "bbbb", "cccc", "dddd"] # inserted line
define Values_idx = [0, 5, 10, 20] # inserted line

# The game starts here.

label start:

$ idx = 10 # inserted line
$ idx1 = 2 # inserted line
"[Values_idx[idx1]]" # inserted line
"[Values_used[Values_idx.index(idx)]]" # inserted line
**********************
Runs perfectly fine (at least with Renpy 8.3.7)

but if I insert the 6 relevant lines in the very beginning (just after start label) of an existing (heavy) script (which runs perfectly fine without modification) I get this exception...

"TypeError: list indices must be integers or slices, not str"

Renpy exception 1.jpg

Exception 1/2

(219.1 KiB) Not downloaded yet

Renpy exception 2.jpg

Exception 2/2

(64.59 KiB) Not downloaded yet

Someone has an idea?
Please share it!

Thanks

script.rpy

full working script

(695 Bytes) Downloaded 1823 times

[enaielei]

Your idx1 value seems to be a string and not an integer as required for a list. E.g., you typed idx1 = "1" instead of idx1 = 1
You can check your idx1 value through the console just before you hit that statement/error. shift + o and type idx1.

Additionally, I think this kind of post belongs here: viewforum.php?f=8
See this for more details, if you're new: viewtopic.php?t=22090

[Martin]

Thanks for the suggestion, but.... it's not that...
Example works (and $idx1 = 2 assign an int to idx1)
Real question is : why something working when alone doesn't work anymore (at run time) when put in a larger file...

[enaielei]

And how are you integrating this into that large file? I missed and just saw your script.rpy, and it works for me.
You really need to check that idx1 value so you can see what's being assigned to it.
If not before, click the Console when you see the error screen and check the value there.

Example reproduction below:

Screenshot 2025-04-26 140919.png (24.52 KiB) Viewed 4508 times

Screenshot 2025-04-26 141049.png (25.83 KiB) Viewed 4507 times

[Martin]

Integration in large file is just cut and paste...
To reassure you, if I add "[idx1]" in large file just after $ idx1 = 2 it correctly displays 2 before crashing on next line...

What could make this work one time (small file) and fail another time (large file)?
Anybody could try to add those 6 lines to a working large script... I would be interested to try zeroing large script conditions which gave an error...

[enaielei]

I'm feeling that you're not entirely sharing what's in your actual code. I'm just giving guidance based on the error that you shared.
FYI, idx1 = "2" and idx1 = 2 would appear the same when displayed as "[idx1]". You'll not get the difference, unlike in the console, where it shows you single quotes to say that it's a string value.

[Martin]

Same code, not retyping it but pasting it...
Small script -> works
Large script -> fails
If I had made the "2" beginner's mistake you suggest it wouldn't work in small file...

What can I add?
Just try it yourself

[enaielei]

I already provided what I can on this topic. It's entirely up to you whether you'll do it or not.

[Martin]

I finally got it!
Difference of behavior is related to file script_version.txt in the game directory.
I imagine that renpy uses this file to 'downgrade' its behavior when using a higher version that these found in this file.
Deleting this file has solved my problem.

Useful to know that it could affect the way a newer engine is used...

[Martin]

Sorry but can't find how to change the title of this topic...Could someone knowing how to pm me?