May 25, 2016
8:14 p.m.
On 05/25/2016 01:08 PM, Eric V. Smith wrote:
How is this an improvement over:
def extract(mapping, *keys): return [mapping[key] for key in keys]
mapping = {'a': 1, 'b': 2, 'c': 3}
x, y = extract(mapping, 'a', 'b') print(x, y) 1, 2
Let's pretend you wrote: a, b = extract(mapping, 'a', 'b') since that's the way I would almost always be using it. The proposal is this: a, b = **mapping The advantages: - much more readable - less duplication Less duplication might not seem like that big a deal, but it's one of the motivators behind decorations and in-place operators, which are both wins. -- ~Ethan~