[RELEASE] Python 3.9.0rc2 is now available for testing

Python 3.9.0 is almost ready. This release, 3.9.0rc2, is the last planned preview before the final release of Python 3.9.0 on 2020-10-05. Get it here: https://www.python.org/downloads/release/python-390rc2/ In the mean time, we strongly e

Re: Asyncio Queue implementation suggestion

Hello Alberto, I scrambled your original message a bit here. > Apparently asyncio Queues use a Linux pipe and each queue require 2 file > descriptors. Am I correct? As far as I know (And I know a bit about asyncio in CPython 3.5+) asyncio.queues.Queue doesn't use any file descriptor. It is imple

Re: Asyncio Queue implementation suggestion

On 17/09/2020 16:51, Dennis Lee Bieber wrote: > On Wed, 16 Sep 2020 13:39:51 -0400, Alberto Sentieri <2...@tripolho.com> > declaimed the following: > >> devices tested simultaneously, I soon run out of file descriptor. Well, >> I increased the number of file descriptor in the application and then

Re: Artie 3000 the coding robot

> > Sounds like an expensive way to do turtle graphics... > > > Really expensive -- From what I could make out, the "robot" has no > independent functioning. It is tethered (WiFi, maybe Bluetooth) to the > controlling computer. The programs run on the computer and send command > packe

Puzzling difference between lists and tuples

I am puzzled by the reason for this difference between lists and tuples. A list of with multiple strings can be reduced to a list with one string with the expected results: for n in ['first','second']: print n for n in ['first']: print n The first loop prints "first", "second", and the

Re: Puzzling difference between lists and tuples

On 2020-09-17 at 09:24:57 -0600, William Pearson wrote: > for n in ('first'): That's not a tuple. That's a string. Try it this way: for n in ('first',): # note the trailing comma print n Dan -- https://mail.python.org/mailman/listinfo/python-list

Re: Puzzling difference between lists and tuples

On 9/17/20 8:24 AM, William Pearson wrote: I am puzzled by the reason for this difference between lists and tuples. A list of with multiple strings can be reduced to a list with one string with the expected results: for n in ['first']: print n ['first'] is a list. for n in ('first'

Re: Puzzling difference between lists and tuples

On 9/17/20 11:24 AM, William Pearson wrote: > I am puzzled by the reason for this difference between lists and tuples. > > A list of with multiple strings can be reduced to a list with one string with > the expected results: > > for n in ['first','second']: > print n > > for n in ['first']: >

Re: Puzzling difference between lists and tuples

On 2020-09-17 17:47, Ethan Furman wrote: On 9/17/20 8:24 AM, William Pearson wrote: I am puzzled by the reason for this difference between lists and tuples. A list of with multiple strings can be reduced to a list with one string with the expected results: for n in ['first']: print n

Re: Puzzling difference between lists and tuples

On 9/17/20 10:43 AM, MRAB wrote: On 2020-09-17 17:47, Ethan Furman wrote: The only time the parentheses are required for tuple building is when they would otherwise not be interpreted that way: They're needed for the empty tuple, which doesn't have a comma. Ah, right. Thanks. -- ~Ethan~

wxpython-OGL fails to render objects with Python-3

I have a substantial wxpython-based application that I'm trying to port from python-2 to -3. Almost everything is working properly, except for a few small but important sections that use the OGL library. That executes without any exceptions, but the objects created within the diagram/canvas

python oop learning communication between function inside a class

Hello, I would like to know how possible it is to call a member function from a class and pass it a variable Example: class Application(tk.Frame): """docstring for .""" def __init__(self, parent): super(Application, self).__init__(parent) self.parent = parent par

Re: Puzzling difference between lists and tuples

On 2020-09-17, MRAB wrote: >> The only time the parentheses are required for tuple building is when >> they would otherwise not be interpreted that way: >> > They're needed for the empty tuple, which doesn't have a comma. > >> some_func('first', 'second') # some_func called with two str args >>

ANN: DIPY 1.2.0

Hello all, We are excited to announce a new release of DIPY: DIPY 1.2 is out! Please support us by citing DIPY in your papers using the following DOI: 10.3389/fninf.2014.8 DIPY 1.2.0 (Wednesday, 9 September 2020) This release received contrib

Re: Puzzling difference between lists and tuples

On Fri, Sep 18, 2020 at 10:53 AM Grant Edwards wrote: > > On 2020-09-17, MRAB wrote: > >> The only time the parentheses are required for tuple building is when > >> they would otherwise not be interpreted that way: > >> > > They're needed for the empty tuple, which doesn't have a comma. > > > >>