Most Micropython ports contain a ‘micropython‘ module, which has a specific function called ‘const()‘. I am led to believe it behaves a lot like ‘#define‘ in C, however, it only accepts integers. Does anyone know why this is? You can declare float constants in C, so why is this unavailable in micropython?
I want to efficiently store values which are used to convert between units, but many of them are float values… (I thought about multiplying them by 10^x and then just dividing by that at runtime, but this will likely take just as long as storing the float in a variable and letting the code use the lookup table).
Any ideas why we can only declare integers with micropython.const()?
Cheers :)
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Answer
With the recent release of v1.19, you can apply const to any object. See PR #8548 for some of the details.
In short, the reason const was initially constrained to ints was simply because the implementation to do so was relatively straightforward.