On Tue, Sep 25, 2018 at 8:32 AM Anders Hovmöller <bo...@killingar.net> wrote:
> > I'm still not sure why all this focus on new syntax or convoluted IDE > enhancements. I presented a very simple utility function that accomplishes > exactly the started goal of DRY in keyword arguments. > > And I’ve already stated my reasons for rejecting this specific solution, > but I’ll repeat them for onlookers: > > 1. Huge performance penalty > Huh? Have you actually benchmarked this is some way?! A couple lookups into the namespace are really not pricey operations. The cost is definitely more than zero, but for any function that does anything even slightly costly, the lookups would be barely in the noise. > 2. Rather verbose, so somewhat fails on the stated goal of improving > readability > The "verbose" idea I propose is 3-4 characters more, per function call, than your `fun(a, b, *, this, that)` proposal. It will actually be shorter than your newer `fun(a, b, =this, =that)` proposal once you use 4 or more keyword arguments. > 3. Tooling* falls down very hard on this > It's true that tooling doesn't currently support my hypothetical function. It also does not support your hypothetical syntax. It would be *somewhat easier* to add special support for a function with a special name like `use()` than for new syntax. But obviously that varies by which tool and what purpose it is accomplishing. Of course, PyCharm and MyPy and PyLint aren't going to bother special casing a `use()` function unless or until it is widely used and/or part of the builtins or standard library. I don't actually advocate for such inclusion, but I wouldn't be stridently against that since it's just another function name, nothing really special. -- Keeping medicines from the bloodstreams of the sick; food from the bellies of the hungry; books from the hands of the uneducated; technology from the underdeveloped; and putting advocates of freedom in prisons. Intellectual property is to the 21st century what the slave trade was to the 16th.
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