Adding lazy evaluation option #11
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The original attempt at just making 'f' lazy doesn't quite work: it changes the return type, which is then blows up in all kinds of ways in the unit-tests. This version introduces another variant that evaluates on the first conversion to 'str', then caches the result. Some unit-tests are added to test scope-preservation and caching behavior.
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An interesting idea. I am still considering the implications, but noting here for you and future me that this would mirror the not-as-of-now-added |
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Hello!
I needed a way to lazy-evaluate f-strings and I have found your library to be an excellent starting point. However, I needed to add a small modification (retaining of the calling scope) to make this feature functional.
In this commit you'll find a new version of 'f', 'lazy_f', which performs this lazy evaluation.
Thanks again for the great work!
Andras