Re: [Python-Dev] Tricky way of of creating a generator via a comprehension expression

2017年11月22日 13:34:24 -0800

On 11/22/2017 01:25 PM, Ivan Levkivskyi wrote:
22 Лис 2017 22:19 "Ethan Furman" пише:
Whether it's inside or outside a function should be irrelevant -- a 
comprehension / generator expression should have
no influence on the type of the resulting function (and at least synchronous 
comprehensions / generator expressions
should be able to live outside of a function).
 def fun_gen():
 return list((yield i) for i in range(3))
 The return says it's returning a list, so that's what it should be returning
def f():
 yield 1
 return list()
Here return also says it should return a list, so this is not an argument.
Right, the argument is that calling the `list` constructor should return a list -- not a database proxy, not a web page, and not a generator.
--
~Ethan~
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