On 3/10/2023 11:15 PM, aapost wrote:
On 3/10/23 22:16, Thomas Passin wrote:
[...]
The additional note in the above is, when taking the def route above,
the thing you would have to consider is what scope is the dictionary pids?
Do you need to submit it to the lambda and subsequently the functi
On 3/10/23 22:16, Thomas Passin wrote:
On 3/10/2023 7:07 PM, aapost wrote:
which does start to break down readability due to line length, as
there isn't really an indention rule set for something uncommonly used.
but some renaming makes the pattern clearer
pids.update({"messages" :subprocess.
On 3/10/2023 10:37 PM, 2qdxy4rzwzuui...@potatochowder.com wrote:
On 2023-03-10 at 22:16:05 -0500,
Thomas Passin wrote:
I'd make the pattern in this example even more understandable and less
error-prone:
def update_pids(target):
cmd = ["tail", "-n", "1", "-f", f"/var/log/{target}"]
p
On 2023-03-10 at 22:16:05 -0500,
Thomas Passin wrote:
> I'd make the pattern in this example even more understandable and less
> error-prone:
>
> def update_pids(target):
> cmd = ["tail", "-n", "1", "-f", f"/var/log/{target}"]
> pids.update({target: subprocess.Popen(cmd)}) if not \
>
On 3/10/2023 7:07 PM, aapost wrote:
which does start to break down readability due to line length, as there
isn't really an indention rule set for something uncommonly used.
but some renaming makes the pattern clearer
pids.update({"messages" :subprocess.Popen(["cmd1"])}) if not
pids["messages
On 3/9/23 15:25, Thomas Passin wrote:
>>> # this is a code snippet from a Tkinter gui app
>>> # in this case lambda is quite convenient
>>> self.btn_cancel = Button(self.progress_container, text='Cancel',
>>> command=lambda: subprocess.call('taskkill /f /im uberzip.exe',
>>> shell=Tr
On 3/10/23 18:46, aapost wrote:
main.pids.update({"messages" :subprocess.Popen(["tail", "-n",
"1", "-f", "/var/log/messages"])}),
main.pids.update({"syslog" :subprocess.Popen(["tail", "-n",
"1", "-f", "/var/log/syslog"])}),
main.pids.update({"kern" :subprocess.Popen([
On 09Mar2023 17:55, aapost wrote:
On 3/9/23 16:37, Cameron Simpson wrote:
Just a note that some code formatters use a trailing comma on the last
element to make the commas fold points. Both yapf (my preference) and
black let you write a line like (and, indeed, flatten if short
enough):
On 3/9/23 16:37, Cameron Simpson wrote:
On 09Mar2023 09:06, Alan Gauld wrote:
Just a note that some code formatters use a trailing comma on the last
element to make the commas fold points. Both yapf (my preference) and
black let you write a line like (and, indeed, flatten if short enough):
On 3/9/23 04:06, Alan Gauld wrote:
Thank you for the feedback, I appreciate the comments.
To add a little extra, there is actually a reason I lean toward overuse
of .config() for a lot of things even though they could be sent to the
constructor (other than that w["attribute"]= doesn't work
On Fri, 10 Mar 2023 at 07:43, Thomas Passin wrote:
>
> On 3/9/2023 3:29 AM, aapost wrote:
> > The 'what I am trying to do' is ask a question regarding opinions and
> > practices on issuing a sequence of actions within a lambda via a tuple
> > (since the common practice approaches against it - main
On 09Mar2023 09:06, Alan Gauld wrote:
Also layout is all important here. It could get very messy to read if
indentation isn't clear. You only have to look at some Javascript code
with function definitions as arguments to functions to see how clunky
that can be.
Just a note that some code forma
On 09Mar2023 09:06, Alan Gauld wrote:
On 08/03/2023 21:56, aapost wrote:
When making a UI there are a lot of binding/trace operations that need
to occur that lead to a lot of annoying 1 use function definitions. I
don't really see lambda use like below.
Lambdas are very common in GUI callback
On 3/9/2023 3:29 AM, aapost wrote:
The 'what I am trying to do' is ask a question regarding opinions and
practices on issuing a sequence of actions within a lambda via a tuple
(since the common practice approaches against it - mainly with tkinter -
feel more convoluted), and in doing so leaving
On 3/9/23 00:13, Thomas Passin wrote:
lol.. 'us'..
So.. to give an example from your own code:
but_play = Tk.Button(_frame, text='Play', width = BUTTONWIDTH + 1, pady
= PADY, command=lambda x=plotmgr:play_macro(x), bg = BUTTON_BG, font =
NEWFONT)
Can be written as:
b = Tk.Button(master=
t;,command=e)
or
b = tk.Button(master=main, text="Enable",command=lambda:
[e.config(state="normal") for e in (e1, e2, e3)])
From: Python-list on
behalf of aapost
Date: Wednesday, March 8, 2023 at 5:15 PM
To: python-list@python.org
Subject: Lambda returning tuple question,
On 08/03/2023 21:56, aapost wrote:
> When making a UI there are a lot of binding/trace operations that need
> to occur that lead to a lot of annoying 1 use function definitions. I
> don't really see lambda use like below.
Lambdas are very common in GUI callbacks but I admit I've never seen
tuple
On 3/8/2023 11:19 PM, aapost wrote:
> In both cases (as per my intent)
Well, that's the trouble. You haven't stated your intent, so we're
forced to try to reverse engineer it. Below I state what my
reverse-engineering effort thinks is your intent. It would be better if
you actually said clea
On 3/8/23 16:56, aapost wrote:
Thomas > Cameron
def set_entries_enabled_state(enabled = True):
state = 'normal' if enabled else 'disabled'
for e in (e1, e2, e3):
e.config(state=state)
def config_b_and_entries(enabled = True):
state = 'normal' if enabled else 'disabled'
On 08Mar2023 16:56, aapost wrote:
When making a UI there are a lot of binding/trace operations that need
to occur that lead to a lot of annoying 1 use function definitions. I
don't really see lambda use like below.
Giving 2 working lambda examples using a returned tuple to accomplish
multipl
On 3/8/2023 4:56 PM, aapost wrote:
b = tk.Button(master=main, text="Enable")
b.config(
command=lambda: (
e1.config(state="normal"),
e2.config(state="normal"),
e3.config(state="normal")
)
)
It's hard to understand what you are trying to do here. I don't
rem
When making a UI there are a lot of binding/trace operations that need
to occur that lead to a lot of annoying 1 use function definitions. I
don't really see lambda use like below.
Giving 2 working lambda examples using a returned tuple to accomplish
multiple expressions - what sort of gotchas
On Apr 6, 5:31 am, "7stud" <[EMAIL PROTECTED]> wrote:
> On Apr 5, 3:08 pm, "Steven W. Orr" <[EMAIL PROTECTED]> wrote:
>
> > I have a tuple that I got from struct.unpack. Now I want to pass the data
> > from the returned tuple to struct.pack
>
> > >>> fmt
>
> > 'l 10l 11i h 4h c 47c 0l'>>>struct.pac
On Apr 5, 3:08 pm, "Steven W. Orr" <[EMAIL PROTECTED]> wrote:
> I have a tuple that I got from struct.unpack. Now I want to pass the data
> from the returned tuple to struct.pack
>
> >>> fmt
>
> 'l 10l 11i h 4h c 47c 0l'>>>struct.pack(fmt, tup)
>
> Traceback (most recent call last):
>File "", l
En Thu, 05 Apr 2007 18:08:14 -0300, Steven W. Orr <[EMAIL PROTECTED]>
escribió:
> I have a tuple that I got from struct.unpack. Now I want to pass the data
> from the returned tuple to struct.pack
>
fmt
> 'l 10l 11i h 4h c 47c 0l'
struct.pack(fmt, tup)
> Traceback (most recent call las
On Apr 5, 2:08 pm, "Steven W. Orr" <[EMAIL PROTECTED]> wrote:
> I have a tuple that I got from struct.unpack. Now I want to pass the data
> from the returned tuple to struct.pack
>
> >>> fmt
>
> 'l 10l 11i h 4h c 47c 0l'>>>struct.pack(fmt, tup)
>
> Traceback (most recent call last):
>File "", l
I have a tuple that I got from struct.unpack. Now I want to pass the data
from the returned tuple to struct.pack
>>> fmt
'l 10l 11i h 4h c 47c 0l'
>>>struct.pack(fmt, tup)
Traceback (most recent call last):
File "", line 1, in ?
struct.error: required argument is not an integer
What's the idi
> Why is this?
It should work.Are you using an old version of Python?
--
http://mail.python.org/mailman/listinfo/python-list
VanL wrote:
Why is this?
>>> class MyTuple(tuple):
... def __getitem__(self, name):
... return tuple.__getitem__(self, name)
...
>>> data = (1,2,3,4,5)
>>> t = MyTuple(data)
>>> t[0]
Traceback (most recent call last):
File "", line 1, in ?
File "", line 3, in __getitem__
TypeErr
I forgot to mention:
>>> mytup=("fred","barney")
>>> tuple.__getitem__(mytup,0)
'fred'
On Tuesday 21 December 2004 09:41 am, VanL wrote:
> Hello,
>
> Why is this?
>
> >>> class MyTuple(tuple):
>
> ... def __getitem__(self, name):
> ... return tuple.__getitem__(self, name)
> ...
>
>
I don't think the tuple name is working as you expect. I don't know of any
reason to redefine "__getitem__()" the way you have done:
>>> class MyTuple(tuple):
... pass
...
>>> data = (1,2,3,4,5)
>>> t = MyTuple(data)
>>> t[0]
1
>>> tuple
>>> tuple.__getitem__
>>> tuple.__getitem__(0)
Tracebac
Hello,
Why is this?
>>> class MyTuple(tuple):
... def __getitem__(self, name):
... return tuple.__getitem__(self, name)
...
>>> data = (1,2,3,4,5)
>>> t = MyTuple(data)
>>> t[0]
Traceback (most recent call last):
File "", line 1, in ?
File "", line 3, in __getitem__
TypeError: descr
32 matches
Mail list logo
