On Wed, Feb 10, 2016 at 10:01 AM, Phil Thompson
wrote:
> On 10 Feb 2016, at 5:52 pm, Guido van Rossum wrote:
[...]
> That should do it, thanks. A followup question...
>
> Is...
>
> def foo(bar: str = Optional[str])
>
> ...valid? In other words, bar can be omitted, but if specified must be a s
On 10 Feb 2016, at 5:52 pm, Guido van Rossum wrote:
>
> On Wed, Feb 10, 2016 at 1:11 AM, Phil Thompson
> wrote:
>> I understand now. The documentation, as it stands, is correct and consistent
>> but (to me) the meaning of Optional is completely counter-intuitive. What
>> you suggest with str =
On Wed, Feb 10, 2016 at 1:11 AM, Phil Thompson
wrote:
> I understand now. The documentation, as it stands, is correct and consistent
> but (to me) the meaning of Optional is completely counter-intuitive. What you
> suggest with str = ... is exactly what I need. Adding a section to the docs
> de
On 10 February 2016 at 06:54, Guido van Rossum wrote:
> [Just adding to Andrew's response]
>
> On Tue, Feb 9, 2016 at 9:58 AM, Andrew Barnert via Python-Dev
> wrote:
>> On Feb 9, 2016, at 03:44, Phil Thompson wrote:
>>>
>>> There are a number of things I'd like to express but cannot find a way t
> On 9 Feb 2016, at 11:48 pm, Guido van Rossum wrote:
>
> [Phil]
I found the documentation confusing regarding Optional. Intuitively it
seems to be the way to specify arguments with default values. However it
is explained in terms of (for example) Union[str, None] and I (intuiti
On 02/09/2016 03:48 PM, Guido van Rossum wrote:
> (Assuming you meant Option*al*.) There seems to be an utter confusion
> of the two uses of the term "optional" here. An "optional argument"
> (outside PEP 484) is one that has a default value. The "Optional[T]"
> notation in PEP 484 means "Union[T
[Phil]
>>> I found the documentation confusing regarding Optional. Intuitively it
>>> seems to be the way to specify arguments with default values. However it is
>>> explained in terms of (for example) Union[str, None] and I (intuitively but
>>> incorrectly) read that as meaning "a str or None"
On 9 Feb 2016, at 8:54 pm, Guido van Rossum wrote:
>
> [Just adding to Andrew's response]
>
> On Tue, Feb 9, 2016 at 9:58 AM, Andrew Barnert via Python-Dev
> wrote:
>> On Feb 9, 2016, at 03:44, Phil Thompson wrote:
>>>
>>> There are a number of things I'd like to express but cannot find a way
[Just adding to Andrew's response]
On Tue, Feb 9, 2016 at 9:58 AM, Andrew Barnert via Python-Dev
wrote:
> On Feb 9, 2016, at 03:44, Phil Thompson wrote:
>>
>> There are a number of things I'd like to express but cannot find a way to do
>> so...
>>
>> - objects that implement the buffer protocol
On Feb 9, 2016, at 03:44, Phil Thompson wrote:
>
> There are a number of things I'd like to express but cannot find a way to do
> so...
>
> - objects that implement the buffer protocol
That seems like it should be filed as a bug with the typing repo. Presumably
this is just an empty type that
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