Show HN: Lazy – A Python library for rapidly developing lazy interfaces

by bwasti • 8 years ago

10 4 8 years ago

Cool. Won't it break if a function is "pure" from the practical point of view but in fact uses some variables (e.g. configuration parameters) declared outside of it?

bwasti2• 8 years ago

as long as configuration parameters remain fixed in the life of the execution it is still pure, right?

qwerty4561272• 8 years ago

Yes, that's what I mean but I'm not sure from the theoretical point of view. I used to believe a truly pure function isn't mean to access anything but what is passed to it as an argument so it makes me wonder what a particular implementation may expect. Whether or not this is Ok can also depend on a particular language runtime or library (and I'm far from an expert in the Python VM internals so far) - it can be impossible or quirky for a function executed asynchronously to access something that belongs to outside of it.

Show HN: Lazy – A Python library for rapidly developing lazy interfaces

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