Four new mystery charts every day, with the satisfaction of figuring out what the data represents from clues alone.
Mystery Function
Guess what a mystery Python function does to your input.
What is Mystery Function?
Mystery Function is a programming challenge from codeset that revolves around a hidden Python function. Its goal is to guess what that function does to an input, testing your understanding of Python behavior. The product is currently in early access on codeset.ai.
How to play Mystery Function
You are presented with a mystery Python function and must work out what it does to an input. Use the clues provided and your knowledge of Python to predict the function's effect. It helps to reason carefully about inputs and outputs, especially when they are subtle or edge-case-driven.
Tips & strategy
- Start with simple, common inputs like empty strings, zero, or short lists to reveal basic behavior.
- Think about common Python built-ins and operations: sorting, reversing, stripping, type conversions, and arithmetic.
- Pay close attention to data types: the same operation can behave very differently on strings, numbers, and lists.
- Consider edge cases such as None, negative numbers, duplicates, or empty containers.
- If the puzzle lets you experiment, keep test inputs small and change only one variable at a time.
Frequently asked questions
Is Mystery Function free?
The codeset site currently offers early access with 2,000 free credits and no card required.
Do I need to know Python to play?
Yes, basic Python knowledge is helpful, since the puzzles focus on guessing what Python functions do.
Is there a mobile app?
There is no mention of an app; Mystery Function appears to be playable through the codeset.ai website.
What is codeset?
Codeset is the learning platform behind Mystery Function. It also lists programming-language tests and software engineering (SWE) skills tests.
How often are new challenges added?
The available site text doesn't specify an update schedule; the product is in early access, so features may still be changing.
Where to play
Play Mystery Functioncodeset.ai · free, new puzzle daily
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