[Python-ideas] Re: pathlib enhancements

2020-11-30 Thread Todd
Does anyone have any further thoughts on these? Should I split these into separate threads? On Sun, Nov 22, 2020 at 10:05 PM Todd wrote: > On Sun, Nov 22, 2020 at 9:49 PM Matt Wozniski wrote: > >> > I suggest adding an "exist_ok" argument to all of these, with >> > the default being "True" for

[Python-ideas] Re: Making the for statement work better with nested functions

2020-11-30 Thread Chris Angelico
On Tue, Dec 1, 2020 at 10:25 AM Marco Sulla wrote: > > On Mon, 30 Nov 2020 at 23:26, David Mertz wrote: > > Somehow "dire" doesn't strike me as the right word Maybe you were > > looking for "conceivably useful in niche cases."? > > Well, I think const can be useful for: > * multiprocessing.

[Python-ideas] Re: Making the for statement work better with nested functions

2020-11-30 Thread Marco Sulla
On Mon, 30 Nov 2020 at 23:26, David Mertz wrote: > Somehow "dire" doesn't strike me as the right word Maybe you were looking > for "conceivably useful in niche cases."? Well, I think const can be useful for: * multiprocessing. Now, for example, dict is passed between processes using MappingP

[Python-ideas] Re: Making the for statement work better with nested functions

2020-11-30 Thread David Mertz
On Mon, Nov 30, 2020, 5:20 AM Paul Sokolovsky > So, if anything, we're re-tracing JavaScript steps. We're in dire need > of const'ness in the language. Somehow I've used Python for 22 years without experiencing that direness. I've taught thousands of students already experienced in other langua

[Python-ideas] Re: Add decorator_with_params function to functools module

2020-11-30 Thread Joao S. O. Bueno
Is it really worth it? Fact is, while it can shave off some lines of code, I think it is interesting to know _which_ lines of code - Usually when one writes a decorator, it is expected that they will know what they are writing, and will want to be in control of their code. Delegating this to a d

[Python-ideas] Re: Add decorator_with_params function to functools module

2020-11-30 Thread Yurii Karabas
The idea of `decorator_factory` is to eliminate boilerplate code that used to create a decorator with parameters. A perfect example is how `dataclass` decorator can be simplified from this: ``` def dataclass(cls=None, /, *, init=True, repr=True, eq=True, order=False, unsafe_hash=Fal

[Python-ideas] Re: Add decorator_with_params function to functools module

2020-11-30 Thread Yurii Karabas
After discussion at the python issue tracker, the better name `decorator_factory` was proposed. I have just gone through the standard library code to find places where `decorator_factory` can be used. 1. `dataclasses.dataclass` ``` def dataclass(cls=None, /, *, init=True, repr=True, eq=True, or

[Python-ideas] Re: Making the for statement work better with nested functions

2020-11-30 Thread Paul Sokolovsky
Hello, On Mon, 30 Nov 2020 12:26:53 + Rob Cliffe wrote: > On 30/11/2020 08:01, Paul Sokolovsky wrote: > > Hello, > > > > On Sun, 29 Nov 2020 18:53:57 -0800 > > Christopher Barker wrote: > > > >> This is a massively less ambitious idea, and doesn't solve the > >> original problem, but: > >

[Python-ideas] Re: adding a timeit.Timer context manager and decorator to time code/functions

2020-11-30 Thread Marco Sulla
On Mon, 30 Nov 2020 at 03:39, Chris Angelico wrote: > > No, Serhiy meant that you can pass a function to timeit. Aaah, didn't know this. On Mon, 30 Nov 2020 at 12:21, Steven D'Aprano wrote: > > On Mon, Nov 30, 2020 at 12:11:01AM +0100, Marco Sulla wrote: > > > You can get the code of a functio

[Python-ideas] Re: adding a timeit.Timer context manager and decorator to time code/functions

2020-11-30 Thread Steven D'Aprano
On Mon, Nov 30, 2020 at 12:11:01AM +0100, Marco Sulla wrote: > You can get the code of a function as a string using `inspect`. *Sometimes*. >>> import inspect >>> def func(): ... return 1 ... >>> inspect.getsource(func) Traceback (most recent call last): [...]

[Python-ideas] Re: Making the for statement work better with nested functions

2020-11-30 Thread Paul Sokolovsky
Hello, On Mon, 30 Nov 2020 08:48:21 + Paul Moore wrote: [] > > > > On the other hand, block-scoped variables are implemented in: > > > > * C > > > > * C++ > > > > * Java > > > > * Rust > > > > * Lua > > > > * JavaScript (not by default, as opt-in) > > > > * Scheme > > > > * Common Lisp (as o

[Python-ideas] Re: Making the for statement work better with nested functions

2020-11-30 Thread Paul Moore
On Mon, 30 Nov 2020 at 08:29, Paul Sokolovsky wrote: > > Hello, > > On Mon, 30 Nov 2020 08:11:07 + > Paul Moore wrote: > > > On Mon, 30 Nov 2020 at 08:03, Paul Sokolovsky > > wrote: > > > On the other hand, block-scoped variables are implemented in: > > > > > > * C > > > * C++ > > > * Java >

[Python-ideas] Re: Making the for statement work better with nested functions

2020-11-30 Thread Paul Sokolovsky
Hello, On Mon, 30 Nov 2020 08:11:07 + Paul Moore wrote: > On Mon, 30 Nov 2020 at 08:03, Paul Sokolovsky > wrote: > > On the other hand, block-scoped variables are implemented in: > > > > * C > > * C++ > > * Java > > * Rust > > * Lua > > * JavaScript (not by default, as opt-in) > > * Scheme

[Python-ideas] Re: Making the for statement work better with nested functions

2020-11-30 Thread Paul Moore
On Mon, 30 Nov 2020 at 08:03, Paul Sokolovsky wrote: > On the other hand, block-scoped variables are implemented in: > > * C > * C++ > * Java > * Rust > * Lua > * JavaScript (not by default, as opt-in) > * Scheme > * Common Lisp (as opt-in) > * ML > * Ocaml > * Haskell > * very long list of other

[Python-ideas] Re: Making the for statement work better with nested functions

2020-11-30 Thread Paul Sokolovsky
Hello, On Mon, 30 Nov 2020 12:56:59 +1300 Greg Ewing wrote: > On 29/11/20 11:02 pm, Paul Sokolovsky wrote: > > It will be much more obvious if there's a general (standalone) > > "const", > > I don't think it will. There's nothing about the problem > that points towards constness as a solution

[Python-ideas] Re: Making the for statement work better with nested functions

2020-11-30 Thread Paul Sokolovsky
Hello, On Sun, 29 Nov 2020 18:53:57 -0800 Christopher Barker wrote: > This is a massively less ambitious idea, and doesn't solve the > original problem, but: > > I'd like to see a scope for names that are "obviously ;-)" meant to be > short lived. At the moment that's the for loop "counters" an