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> it would be difficult to tell which python expressions are evaluated at the moment of a conversion definition AND which in the compiled code

this is ofc a valid concern in any metaprogramming situation. has this been a problem in your experience? i'm guessing e.g. generating a conversion based on a list of fields is a thing someone might do, but it feels like a minority usecase (at least to me, someone with no actual experience with using the library :p)

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Re: whether it's been a problem in my experience -- sort of - yes

So now I'm doing my best to observe: PEP-20 the 2nd commandment with the hope that I'm not violating the 1st commandment badly :) https://www.python.org/dev/peps/pep-0020/

Also I see another upside of this no-magic syntax in that it is distinctive -- there's no way to mix up convtools-related code with any other python code.

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