[Python-ideas] Conventions for function annotations

[Thomas Kluyver]

On 4 December 2012 16:43, Jasper St. Pierre <jstpierre at mecheye.net> wrote:

> The local decorator influence might work, but that has the problem of only
> being able to be used once before we fall back to the old method. Would you
> rather:
>
>     @tab_expand(filename=glob('*.txt'))
>     @types
>     def read_from_filename(filename:str, num_bytes:int) -> bytes:
>         pass
>
> or
>
>     @tab_expand(filename=glob('*.txt'))
>     @types(filename=str, num_bytes=int, return_=bytes)
>     def read_from_filename(filename, num_bytes):
>         pass
>
> For consistency's sake, I'd prefer the latter.
>

Using the decorator decorator I posted (https://gist.github.com/4189289 ),
you could use these interchangeably, so the annotations are just a
convenient alternative syntax for when you think they'd make the code more
readable.

Thomas
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