Why is pkl not working?

So I made a gambling game where you open crates to get hats. I have it set up to save your hats between runs, but when you try to see your hats, nothing happens. The project is here: Click here

You’re loading the hat_list from a file if it exists, but you’re reinitializing hat_list to [""] right after that. This will erase any hats loaded from the file. You should initialize hat_list only if the file does not exist.

Another thing that I noticed is that in the inventory() function, you’re using "ab" (append binary) mode to save hat_list . Usually this cause duplicate entries since this will append the entire list everytime. You should use "wb" (write binary) mode to overwrite the file with the updated hat_list .

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