On 29 dic, 12:42, [EMAIL PROTECTED] wrote:
> am a beginner in python and PIL .I need to read an RGB 8 bit image
> (am using jpeg )and pack the rgb color values into a double value so i
> can store the image as a list of pixelvalues.From my application i
> should be able to call rgbimage1.getpixel
On 30 dic, 04:57, Gabriel Genellina <[EMAIL PROTECTED]> wrote:
> The PIL docs at [1] say that using getpixel is very slow, and suggest
Sorry, dropped the reference:
[1] http://www.effbot.org/imagingbook/image.htm#tag-Image.Image.getpixel
--
Gabriel Genellina
--
http://mail.python.org/mailman/l
On Sat, 29 Dec 2007 15:10:24 -0800, Raymond Hettinger wrote:
> These thoughts reflect my own experience with the itertools module.
> It may be that your experience with them has been different. Please
> let me know what you think.
I seem to be in a minority here as I use both functions from time
[EMAIL PROTECTED] writes:
> On 28 dic, 20:12, Riccardo Murri <[EMAIL PROTECTED]> wrote:
>
>> The list `self.base` contains "canonical" forms of the graphs and the
>> `graph` object must compare equal to some item of the list, which
>> indeed it does::
>>
>> (Pydb) p graph == self.base[27]
>>
Hi,
you should ask SQLObject related questions better at
"SQLObject discussion" <[EMAIL PROTECTED]>
Oleg Broytman and others are very helpful there.
Markus
--
http://mail.python.org/mailman/listinfo/python-list
On Dec 29, 7:17 pm, Istvan Albert <[EMAIL PROTECTED]> wrote:
> On Dec 29, 12:50 pm, bukzor <[EMAIL PROTECTED]> wrote:
>
> > Is this functionality intended? It seems very unintuitive. This has
> > caused a bug in my programs twice so far, and both times I was
> > completely mystified until I realize
John Thingstad schrieb:
> Skrev Joachim Durchholz <[EMAIL PROTECTED]>:
>
>> However, for web applications, I found a far easier variant: I just
>> reload the page being debugged. (I have to make sure that the backend
>> is in the same state when reloading, but that's usually easy to
>> accompli
Dear fellow Pythonians,
I just stumbled upon the following unexpected behavior:
class TestType(type):
def Foo(self): return 'TestType Foo'
class Test(object):
__metaclass__ = TestType
def Foo(self): return 'Test Foo'
t = Test()
print t.Foo()
print Test.Foo()
This will produce:
Test F
[EMAIL PROTECTED] wrote:
> Dear fellow Pythonians,
>
> I just stumbled upon the following unexpected behavior:
>
> class TestType(type):
> def Foo(self): return 'TestType Foo'
> class Test(object):
> __metaclass__ = TestType
> def Foo(self): return 'Test Foo'
> t = Test()
> print t.Fo
On Dec 30, 5:23 am, thebjorn <[EMAIL PROTECTED]>
wrote:
>def age(dob, today=datetime.date.today()):
>...
>
> None of my unit tests caught that one :-)
interesting example I can see how it caused some trouble. A quick fix
would be to write it:
def age(dob, today=datetime.date.today ):
> (May I ask why an accessor like getpixellist() instead of simply
> rgbimage1.pixellist?)
sorry,
bad style of coding on my part..was doing java stuff..
>
> I don't get the name - why "rgb to double"? This does not return a
> "double", but a long integer,
actually it was to be of 'long' type not
On 30 dic, 06:24, Riccardo Murri <[EMAIL PROTECTED]> wrote:
> [EMAIL PROTECTED] writes:
>
> >> (Pydb) p graph == self.base[27]
> >> True
> >> (Pydb) p graph in self.base
> >> True
> >> (Pydb) self.base.index(graph)
> >> *** ValueError: list.index(x): x not in list
> > Looking at the
On Dec 29, 11:21 pm, bukzor <[EMAIL PROTECTED]> wrote:
> The standard library is not affected because
the people who wrote code into it know how python works.
Programming abounds with cases that some people think should work
differently:
a = b = []
a.append(1)
is b empty or not at this point?
On 30 dic, 10:53, [EMAIL PROTECTED] wrote:
> > I don't get the name - why "rgb to double"? This does not return a
> > "double", but a long integer,
>
> actually it was to be of 'long' type not double..sorry again
Notice that a Python 'long' is an infinite range integer; the C 'long'
type maps to
Greetings,
I'm trying to redirect python's stdout to another location. The
reason for this is that I'm embedding python in an application. Now,
originally my code was developed for Linux and that did not require
redirection due to the fact that every X11 application can have an
STDOUT assoc
On Dec 30, 3:29 am, Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]> wrote:
> One "recipe" is extracting blocks from text files that are delimited by a
> special start and end line.
Neat solution!
I actually need such functionality every once in a while.
Takewhile + dropwhile to the rescue!
i.
--
Through The Internet
INTRODUCTION
The following story occurred on the Internet
through one of the chat programs (Freetel) in January 1999. It is a
real dialogue between a Christian and a Muslim. The story centers on
Derek's realization of today's Christianity and his subseq
Hi list and python gurus :-)
I'm playing with some mod_python and web development. And in me code I
need to do som dynamic imports.
Right now I just do a:
exec 'import '+some_modulename
But it seems to easy, is there a "dark side" to doing it this way?
(memory use,processing ,etc)
And have to I
Tom Gaudasinski wrote:
> Greetings,
> I'm trying to redirect python's stdout to another location. The
> reason for this is that I'm embedding python in an application. Now,
> originally my code was developed for Linux and that did not require
> redirection due to the fact that every X11 appl
On Dec 30, 8:24 am, [EMAIL PROTECTED] wrote:
> Hi list and python gurus :-)
>
> I'm playing with some mod_python and web development. And in me code I
> need to do som dynamic imports.
> Right now I just do a:
>
> exec 'import '+some_modulename
The correct way to do this is use the __import__ funct
Hallöchen!
[EMAIL PROTECTED] writes:
> I'm playing with some mod_python and web development. And in me
> code I need to do som dynamic imports. Right now I just do a:
>
> exec 'import '+some_modulename
>
> But it seems to easy, is there a "dark side" to doing it this way?
> (memory use,processin
En Sun, 30 Dec 2007 12:24:53 -0200, <[EMAIL PROTECTED]> escribi�:
> I'm playing with some mod_python and web development. And in me code I
> need to do som dynamic imports.
> Right now I just do a:
>
> exec 'import '+some_modulename
>
> But it seems to easy, is there a "dark side" to doing it this
First of thanks to all for you, especially for the quick replys.
Just need to walk the dog then I giv it a short.
On Dec 30, 3:57 pm, "Gabriel Genellina" <[EMAIL PROTECTED]>
wrote:
>
> > Do anybody now a good howto or tutorial to this?
>
> No... what do you want covered?
Nothing, think you repl
On Dec 30, 4:12 pm, Istvan Albert <[EMAIL PROTECTED]> wrote:
> On Dec 30, 3:29 am, Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]> wrote:
>
> > One "recipe" is extracting blocks from text files that are delimited by a
> > special start and end line.
>
> Neat solution!
>
> I actually need such function
This is a well-known python gotcha. See:
http://www.ferg.org/projects/python_gotchas.html#contents_item_6
--
http://mail.python.org/mailman/listinfo/python-list
On Dec 29, 9:14 pm, bukzor <[EMAIL PROTECTED]> wrote:
> Here's the answer to the
> question:http://www.python.org/doc/faq/general/#why-are-default-values-shared-...
>
> It looks like Guido disagrees with me, so the discussion is closed.
Note that the FAQ mainly explains *what* happens, not *why*
* Steven D'Aprano (Sun, 30 Dec 2007 00:37:32 -)
> On Sat, 29 Dec 2007 15:29:25 +, Thorsten Kampe wrote:
> > I'd personally go for spaces because:
> >
> > 1. I don't like things I cannot see (control characters)
>
> You can see spaces but not tabs? Your editor is pretty weird. In all the
* Ben Finney (Sun, 30 Dec 2007 15:36:12 +1100)
> Steven D'Aprano <[EMAIL PROTECTED]> writes:
> > On Sat, 29 Dec 2007 15:29:25 +, Thorsten Kampe wrote:
> > > I'd personally go for spaces because:
> > >
> > > 1. I don't like things I cannot see (control characters)
> >
> > You can see spaces bu
On Dec 29, 6:05 pm, Dennis Lee Bieber <[EMAIL PROTECTED]> wrote:
> On Sat, 29 Dec 2007 15:31:30 -0800 (PST), [EMAIL PROTECTED] declaimed
> the following in comp.lang.python:
>
>
>
> > I can't figure out why this doesn't work. Any ideas appreciated.
>
> > conn = MySQLdb.connect (db = "vocab")
>
>
On Dec 30, 2:45 pm, Istvan Albert <[EMAIL PROTECTED]> wrote:
> On Dec 30, 5:23 am, thebjorn <[EMAIL PROTECTED]>
> wrote:
>
> >def age(dob, today=datetime.date.today()):
> >...
>
> > None of my unit tests caught that one :-)
>
> interesting example I can see how it caused some trouble. A
Happy holidays all!
I'm developing an application and, as a relative newbie to Python, have come
across a stumbling block with Tkinter.
I'd like to have a button that when pressed executes a loop (this could be a
thread) and then stops execution when it's released (Push to Make - Single
Pole i
On Dec 22, 1:59 pm, James Stroud <[EMAIL PROTECTED]> wrote:
> Dustan wrote:
> > On Dec 21, 8:11 pm, James Stroud <[EMAIL PROTECTED]> wrote:
> >> I swear there is another thread going on here of which I am not aware.
>
> > You just keep on telling yourself that.
>
> Is there a cricket here?
No, but
Hallöchen!
I sub-classed unicode in an own class called "Excerpt", and now I
try to implement a __unicode__ method. In this method, I want to
get the actual value of the instance, i.e. the unicode string:
def __unicode__(self):
"""Returns the Unicode representation of Excerpt. Note
On Dec 30, 2:23 am, thebjorn <[EMAIL PROTECTED]>
wrote:
> Scenario: long running server process,
> Bug report: "people aren't getting older", Code:
>
>def age(dob, today=datetime.date.today()):
>...
A very interesting example, thanks.
On Dec 30, 8:25 am, [EMAIL PROTECTED] wrote:
> Thi
On Dec 30, 11:26 am, George Sakkis <[EMAIL PROTECTED]> wrote:
> I'm with you on this one; IMHO it's one of the relatively few language
> design missteps of Python, favoring the rare case as the default
> instead of the common one.
George, you pointed this out this link in a different thread
http
On Dec 30, 12:32 pm, Istvan Albert <[EMAIL PROTECTED]> wrote:
> On Dec 30, 11:26 am, George Sakkis <[EMAIL PROTECTED]> wrote:
>
> > I'm with you on this one; IMHO it's one of the relatively few language
> > design missteps of Python, favoring the rare case as the default
> > instead of the common o
On 30 dic, 17:25, Torsten Bronger <[EMAIL PROTECTED]>
wrote:
> I sub-classed unicode in an own class called "Excerpt", and now I
> try to implement a __unicode__ method. In this method, I want to
> get the actual value of the instance, i.e. the unicode string:
The "actual value of the instance",
On Dec 30, 3:41 pm, bukzor <[EMAIL PROTECTED]> wrote:
> No globals, as you specified. BTW, it's silly not to 'allow' globals
> when they're called for, otherwise we wouldn't need the 'global'
> keyword.
okay, now note that you do not actually use the ingroup list for
anything else but getting and
Hopefully you've found it by now and didn't have a frustrating
christmas :).
Get the source from sourceforge and then follow the instructions here.
http://www.davidcramer.net/code/57/mysqldb-on-leopard.html
Worked perfectly for me on OSX 10.5, python 2.5. Was frustrating to
find. Good luck!
Hallöchen!
Gabriel Genellina writes:
> On 30 dic, 17:25, Torsten Bronger <[EMAIL PROTECTED]>
> wrote:
>
>> I sub-classed unicode in an own class called "Excerpt", and now I
>> try to implement a __unicode__ method. In this method, I want to
>> get the actual value of the instance, i.e. the unico
On 30 dic, 19:08, Torsten Bronger <[EMAIL PROTECTED]>
wrote:
> Gabriel Genellina writes:
> > On 30 dic, 17:25, Torsten Bronger <[EMAIL PROTECTED]>
> > wrote:
>
> >> I sub-classed unicode in an own class called "Excerpt", and now I
> >> try to implement a __unicode__ method. In this method, I want
Christian Heimes wrote:
> Tom Gaudasinski wrote:
>
>> Greetings,
>> I'm trying to redirect python's stdout to another location. The
>> reason for this is that I'm embedding python in an application. Now,
>> originally my code was developed for Linux and that did not require
>> redirection
Hallöchen!
Gabriel Genellina writes:
> On 30 dic, 19:08, Torsten Bronger <[EMAIL PROTECTED]>
> wrote:
>
>> [...]
>>
>> But then it is not unicode but Excerpt which I don't want. The
>> idea is to buffer the unicode representation in order to gain
>> efficiency. Otherwise, a lot of unicode conve
> How does my object get its own value?
def __unicode__(self):
return unicode(self)
Regards,
Martin
--
http://mail.python.org/mailman/listinfo/python-list
On Dec 31, 8:08 am, Torsten Bronger <[EMAIL PROTECTED]>
wrote:
> Hallöchen!
>
> Gabriel Genellina writes:
> > On 30 dic, 17:25, Torsten Bronger <[EMAIL PROTECTED]>
> > wrote:
>
> >> I sub-classed unicode in an own class called "Excerpt", and now I
> >> try to implement a __unicode__ method. In thi
[EMAIL PROTECTED] schrieb:
> First of thanks to all for you, especially for the quick replys.
>
> Just need to walk the dog then I giv it a short.
Please, don't kill your dog! We're a peace-loving community here that
respects dogs, and snakes and even trolls.
SCNR,
Diez
--
http://mail.python.
Hallöchen!
Martin v. Löwis writes:
>> How does my object get its own value?
>
> def __unicode__(self):
> return unicode(self)
I get an endless recursion with this.
I must admit, though, that I probably overestimate the costs
connected with unicode(my_excerpt) because Gabriel is probably r
Hallöchen!
John Machin writes:
> On Dec 31, 8:08 am, Torsten Bronger <[EMAIL PROTECTED]>
> wrote:
>
>> [...]
>>
>> But then it is not unicode but Excerpt which I don't want. The
>> idea is to buffer the unicode representation in order to gain
>> efficiency. Otherwise, a lot of unicode conversio
<[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
| Dear fellow Pythonians,
|
| I just stumbled upon the following unexpected behavior:
|
| class TestType(type):
|def Foo(self): return 'TestType Foo'
| class Test(object):
|__metaclass__ = TestType
|def Foo(self): return 'Tes
On Sun, 30 Dec 2007 20:33:19 +, Thorsten Kampe wrote:
> * Steven D'Aprano (Sun, 30 Dec 2007 00:37:32 -)
>> On Sat, 29 Dec 2007 15:29:25 +, Thorsten Kampe wrote:
>> > I'd personally go for spaces because:
>> >
>> > 1. I don't like things I cannot see (control characters)
>>
>> You can
On Sun, 30 Dec 2007 12:41:57 -0800, bukzor wrote:
> BTW, it's silly not to 'allow' globals when they're called for,
> otherwise we wouldn't need the 'global' keyword.
Nobody argues against allowing globals variables *when they're called
for*, just pointing out that ninety-nine times out of a hun
On Sun, 30 Dec 2007 13:34:07 -0800, Dennis Lee Bieber wrote:
> On Sun, 30 Dec 2007 12:11:50 -0800 (PST), bukzor
> <[EMAIL PROTECTED]> declaimed the following in comp.lang.python:
>
>
>> Just because it's well known doesn't mean we shouldn't think about it.
>> For example, in the same list you li
On Sun, 30 Dec 2007 20:41:09 +, Thorsten Kampe wrote:
> Anyway: the consequence of your well done argumentation is that
> someone editing Python code has to use a specialised editor to prevent
> screwing up tab indented code - and that's bad.
You just need to use an editor that inserts tab ch
[bearophile]
> Here are my usages (every sub-list is
> sorted by inverted frequency usage):
>
> I use often or very often:
> groupby( iterable[, key])
> imap( function, *iterables)
> izip( *iterables)
> ifilter( predicate, iterable)
> islice( iterable, [start,] stop [, step])
>
> I use once in whil
[Michele Simionato]
> in my code
> base I have exactly zero occurrences of takewhile and
> dropwhile, even if I tend to use the itertools quite
> often. That should be telling.
Thanks for the additional empirical evidence.
> I presume you did scans of
> large code bases and you did not find occur
On Dec 31, 1:24 am, [EMAIL PROTECTED] wrote:
> Hi list and python gurus :-)
>
> I'm playing with somemod_pythonand web development. And in me code I
> need to do som dynamic imports.
> Right now I just do a:
>
> exec 'import '+some_modulename
>
> But it seems to easy, is there a "dark side" to doin
[Marc 'BlackJack' Rintsch]
> I use both functions from time to time.
> One "recipe" is extracting blocks from text files that are delimited by a
> special start and end line.
>
> def iter_block(lines, start_marker, end_marker):
> return takewhile(lambda x: not x.startswith(end_marker),
>
FWIW, here is an generator version written without the state flag:
def iter_block(lines, start_marker, end_marker):
lines = iter(lines)
for line in lines:
if line.startswith(start_marker):
yield line
break
for line in lines:
Steven D'Aprano <[EMAIL PROTECTED]> writes:
> On Sun, 30 Dec 2007 20:41:09 +, Thorsten Kampe wrote:
>
> > Anyway: the consequence of your well done argumentation is that
> > someone editing Python code has to use a specialised editor to prevent
> > screwing up tab indented code - and that's b
Hi everyone,
I would like to use a python script to export (save as...) all my
contacts in Evolution to VCard format (.vcf). I am a beginner so I
don't knock how to use evolution-python module. The second part of the
script would be to make inserts to a database, at these second part, I
think I ca
Hello,
I am new to python and wanted to write something for myself where
after inputing two words it would search entire drive and when finding
both names in files name would either copy or move thoe files to a
specified directory.
But couple of attempts did not work as desired this is one of the
> path = r"c:\\"
I don't know if this is the whole problem, but this line should read
r'c:\' (one backslash).
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On Dec 31, 1:25 am, Raymond Hettinger <[EMAIL PROTECTED]> wrote:
> FWIW, here is an generator version written without the state flag:
>
> def iter_block(lines, start_marker, end_marker):
> lines = iter(lines)
> for line in lines:
> if line.startswith(start_marker):
>
On Sun, 30 Dec 2007 18:42:50 -0800 (PST), infixum <[EMAIL PROTECTED]>
wrote:
>
>> path = r"c:\\"
>
>I don't know if this is the whole problem, but this line should read
>r'c:\' (one backslash).
after changing i got this
path = r"c:\"
^
SyntaxError: EOL while scanning single-
>
> after changing i got this
>
> path = r"c:\"
> ^
> SyntaxError: EOL while scanning single-quoted string
Sorry about that. You can't end with a backslash - my bad. I just
tried this in the interpreter and 'c:' works.
--
http://mail.python.org/mailman/listinfo/python-list
On Dec 31, 1:04 pm, [EMAIL PROTECTED] wrote:
> Hello,
>
> I am new to python and wanted to write something for myself where
> after inputing two words it would search entire drive and when finding
> both names in files name would either copy or move thoe files to a
> specified directory.
>
> But co
One bad design about elementtree is that it has different ways parsing a
string and a file, even worse they return different objects:
1) When you parse a file, you can simply call parse, which returns a
elementtree, on which you can then apply xpath;
2) To parse a string (xml section), you can ca
On Sun, 30 Dec 2007 19:29:38 -0800 (PST), John Machin
<[EMAIL PROTECTED]> wrote:
>On Dec 31, 1:04 pm, [EMAIL PROTECTED] wrote:
>> Hello,
>>
>> I am new to python and wanted to write something for myself where
>> after inputing two words it would search entire drive and when finding
>> both names i
On Dec 30, 3:34 pm, Steven D'Aprano <[EMAIL PROTECTED]
cybersource.com.au> wrote:
> On Sun, 30 Dec 2007 12:41:57 -0800, bukzor wrote:
> > BTW, it's silly not to 'allow' globals when they're called for,
> > otherwise we wouldn't need the 'global' keyword.
>
> Nobody argues against allowing globals v
On Fri, 28 Dec 2007 22:07:12 -0800 (PST), [EMAIL PROTECTED] wrote:
>Ada is airline/dod blessed.
Airline blessed maybe. The DOD revoked its Ada only edict because
they couldn't find enough Ada programmers. AFAIK, Ada is still the
preferred language, but it is not required.
George
--
for email r
On Dec 31, 2:44 pm, [EMAIL PROTECTED] wrote:
> On Sun, 30 Dec 2007 19:29:38 -0800 (PST), John Machin
>
>
>
>
>
> <[EMAIL PROTECTED]> wrote:
> >On Dec 31, 1:04 pm, [EMAIL PROTECTED] wrote:
> >> Hello,
>
> >> I am new to python and wanted to write something for myself where
> >> after inputing two wo
On Sun, 30 Dec 2007 20:49:29 -0800 (PST), John Machin
<[EMAIL PROTECTED]> wrote:
>On Dec 31, 2:44 pm, [EMAIL PROTECTED] wrote:
>> On Sun, 30 Dec 2007 19:29:38 -0800 (PST), John Machin
>>
>>
>>
>>
>>
>> <[EMAIL PROTECTED]> wrote:
>> >On Dec 31, 1:04 pm, [EMAIL PROTECTED] wrote:
>> >> Hello,
>>
>> >
hi all, i am new to python, can anyone tell me how can i connect to a remote machine using python and execute commands.Thanking you..Regards, ---ViNOJ DAViS---
Chat on a cool, new interface. No download required. Click here.
--
http://mail.python.org/mailman/list
Some python ssh packages are available if you are wanting to execute
commands on a machine that has ssh. ssh servers are available for
windows, but they aren't necessarily so well supported.
Here's a simple approach that works on ssh servers:
import commands
hostname = commands.getoutput('ssh [E
on Sat, 29 Dec 2007 04:51:12 -0800 (PST), seb <[EMAIL PROTECTED]> wrote:
> Hi Pythonistas,
>
> Is anyone interested in forming a Brussels(Belgium) area Python User
> Group ? I am not aware of any python focused group in this area.
>
> Language could be whatever fits the bill (English/French/Dutch/.
Hello group,
I have been able to successfully compile python 2.5.1 using MSVC 8
compiler .
Now i want to build an msi installer out of this. What's procedure
that I should follow for this ??
Thank You
--
http://mail.python.org/mailman/listinfo/python-list
Raymond Hettinger wrote:
> I'm considering deprecating these two functions and would like some
> feedback from the community or from people who have a background in
> functional programming.
>
> * I'm concerned that use cases for the two functions are uncommon and
> can obscure code rather than cl
on Tue, 25 Dec 2007 20:42:03 -0800 (PST), [EMAIL PROTECTED] <[EMAIL PROTECTED]>
wrote:
>
> Hi everyone,
>
> I have to develop a web based enterprise application for my final year
> project. Since i am interested in open source, i searched the net.
> Almost 90% of them were PHP and MySQL. Cant we u
On Sun, 30 Dec 2007 20:00:14 -0800, bukzor wrote:
> I think you struck at the heart of the matter earlier when you noted
> that this is the simplest way to declare a static variable in python.
> Using the 'global' keyword is the other way, and is much more explicit,
> and much more widely used. I
On Sun, 30 Dec 2007 22:52:32 -0800, Dennis Lee Bieber
<[EMAIL PROTECTED]> wrote:
>On Sun, 30 Dec 2007 23:58:17 -0500, [EMAIL PROTECTED] declaimed the
>following in comp.lang.python:
>
>
>> I am sorry i thought I did say what I was tryng to do.
>
> The only thing I picked up from the thread i
On Dec 31, 3:42 am, "Peter Pei" <[EMAIL PROTECTED]> wrote:
> One bad design about elementtree is that it has different ways parsing a
> string and a file, even worse they return different objects:
> 1) When you parse a file, you can simply call parse, which returns a
> elementtree, on which you can
En Mon, 31 Dec 2007 05:01:51 -0200, Steven D'Aprano
<[EMAIL PROTECTED]> escribió:
> On Sun, 30 Dec 2007 20:00:14 -0800, bukzor wrote:
>
>> I also see this as the main use of the
>> 'notlocal' keyword to be introduced in py3k (it also fixes the example
>> given by Istvan above).
>
> There doesn't
"Jon Todd" wrote:
>I'd like to have a button that when pressed executes a loop (this could be a
>thread) and then stops execution when it's released (Push to Make - Single
>Pole in electronics terms).
>
>I've tried the regular way of associating the procedure with a callback and
>tried using an
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