On Mon, 18 Jun 2018 11:34:40 -0700, Jim Lee wrote:
> On 06/18/2018 11:18 AM, Chris Angelico wrote:
>> What, fundamentally, is the difference between type hints and
>> assertions, such that - in
>> your view - one gets syntax and the other is just comments?
> Type hints are just that - hints. They have no syntactic meaning to the
> parser, and do not affect the execution path in any way. Therefore, they
> are effectively and actually comments. The way they have been
> implemented, though, causes noise to be interspersed with live code and,
> as others have said, are difficult to remove or ignore.
So let me get this straight...
Using annotations is evil, because it intersperses noise with live code:
def function(argument: int,
flag: bool,
sequence: list) -> str:
...
But using comments is great, because it doesn't:
def function(argument, # type=int,
flag, # type=bool,
sequence, # type=list): # type=str
...
Okay, I'm glad we cleared that up.
--
Steven D'Aprano
"Ever since I learned about confirmation bias, I've been seeing
it everywhere." -- Jon Ronson
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