try this in Python: 'from __future__ import braces'. There's only one way to do it, and Python doesn't think that's it.
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Coming from JS or Python, imports in Rust feel weird. They're entirely optional aliases for fully qualified symbols, which are always available.
I don't know of many other languages where you can just start using libraries. Java is the only one I can think of.
Assertions are a surprisingly nuanced design space. In a test, if I assert `x < y`, I really want to see the values of x and y when it fails.
Do you define an API for every possible predicate (Python's assertLess, expect.js) or try to support the native syntax (c.f. pytest)?
Designing UIs is such a hard problem.
Sometimes I try a bunch of options and I settle on "this one seems the least annoying".