String to Float, without introducing errors

I have a large/long array of numbers in an external file. The numbers look like this: -64550.727 -64511.489 -64393.637 -64196.763 -63920.2 -63563.037 -63124.156 -62602.254 -61995.895 -61303.548 -60523.651 -59654.66 ... When I bring the numbers into my code, they are Strings. To use the numbers i

Re: String to Float, without introducing errors

+ (7 * 0.1) + (2 * 0.01) + (7 * 0.001) Now I do not need to! > On 17 Dec 2022, at 13:11, Alan Gauld wrote: > > On 17/12/2022 11:51, Paul St George wrote: >> I have a large/long array of numbers in an external file. The numbers look >> like this: >> >> -6455

String to Float, without introducing errors

fully aware of what goes on under the bonnet. Here is a picture: https://paulstgeorge.com/newton/cyclography.html Thanks, Paul >> On 17 Dec 2022, at 16:54:05 EST 2022, Thomas Passin wrote: On 12/17/2022 3:45 PM, Paul St George wrote: > Thanks to all! > It was the rounding roundin

String to Float, without introducing errors

fully aware of what goes on under the bonnet.  >> On 17 Dec 2022, at 16:54:05 EST 2022, Thomas Passin wrote: On 12/17/2022 3:45 PM, Paul St George wrote: > Thanks to all! > It was the rounding rounding error that I needed to avoid (as Peter J. Holzer > suggested). The

for convenience

When I am writing code, I often do things like this: context = bpy.context # convenience then whenever I need bpy.context, I only need to write context Here’s my question: When I forget to use the convenient shorter form why is bpy.context not interpreted as bpy.bpy.context? — Paul St

Re: for convenience

; the `context` attribute in the `bpy` module. > > On Mon, 2022-03-21 at 22:12 +0100, Paul St George wrote: >> >> When I am writing code, I often do things like this: >> >> context = bpy.context # convenience >> >> then whenever I need bpy.context, I only

Re: for convenience

On 21/03/2022 18.04, dn wrote: > On 22/03/2022 10.17, Chris Angelico wrote: > > On Tue, 22 Mar 2022 at 08:13, Paul St George > <https://mail.python.org/mailman/listinfo/python-list>> wrote: > >> > >> > >> When I am writing code, I often do t

Re: for convenience

On 21/03/2022 18.02, Cameron Simpson wrote: > On 21Mar2022 22:12, Paul St George wrote: > >When I am writing code, I often do things like this: > > > >context = bpy.context # convenience > > > >then whenever I need bpy.context, I only need to write cont

Re: for convenience

On 21/03/2022 17.47, Avi Gross wrote: > So, I ask Paul what other language than python he has used before, just out > of curiosity. The other language I have used (and often) is Processing. Before that, and a long time ago, Lingo. — Paul -- https://mail.python.org/mailman/listinfo/pyth

Re: for convenience

is super interesting. You have my permission, and please feel free to contact me offline if you want to ask anything. Yes, I had noticed the tandem with @Chris. I think I needed both! I already have a folder on my Mac called ‘Cameron’. Perhaps I now need an additional folder. Then I can ask my question about whether Python grows to be more like its programmers, or do programmers learn to think Pythonically? — Paul St George -- https://mail.python.org/mailman/listinfo/python-list

The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

I am using the Python Imaging Library (PIL), Python 2 and Raspberry Pi 3 B+ My code is simply:     from PIL import Image     im = Image.open(‘somepic.jpg’)     im.show() # display image But the show() method looks for the default viewer (probably xv). How do I change this (in the code, or in

Re: Re: The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

tml#PIL.Image.Image.show>, but I am none the wiser. On 26/05/2018 01:02, boB Stepp wrote: On Fri, May 25, 2018 at 6:04 AM, Paul St George wrote: I am using the Python Imaging Library (PIL), Python 2 and Raspberry Pi 3 B+ My code is simply: from PIL import Image im = Image.open(‘somep

Re: Re: The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

mand". If you need to provide more than the program name, you may have to instead create a shell-script, set it executable, and pass the script name -- have the script then invoke the program with the options and forwarding the temporary file name to it. -- Paul St George http:/

Re: Re: Re: The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

", file=sys.stderr) else: image = Image.open(file) image.show() Here's another, even simpler one: class Gwenview(ImageShow.UnixViewer): def get_command_ex(self, file, **options): return ("gwenview",) * 2 -- Paul St George http://www.p

Re: Re: The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

Should the PIL code be corrected? On 28/05/2018 06:34, Christian Gollwitzer wrote: Am 27.05.18 um 23:58 schrieb Cameron Simpson: On 27May2018 20:15, Paul St George wrote: This is very helpful indeed, thank you. Awe-inspiring. It occurred to me that I could edit the PIL/ImageShow.py

Re: Re: The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

Thank you. For the advice, and for the new word 'monkeypatch'. On 27/05/2018 23:58, Cameron Simpson wrote: On 27May2018 20:15, Paul St George wrote: This is very helpful indeed, thank you. Awe-inspiring. It occurred to me that I could edit the PIL/ImageShow.py, replacing ‘xv

Re: Re: The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

I tried this anyway. The error was:     non-keyword arg after keyword arg On 27/05/2018 21:51, Dennis Lee Bieber wrote: On Sun, 27 May 2018 19:59:41 +0200, Paul St George declaimed the following: So, on Unix I would use Image.show(title=None, nameofdisplayutilty), or Image.show(title

Re: Re: Re: Re: The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

Is there, somewhere, a list of viewers and their names (for the purposes of this script)? I am assuming that if I want to ImageMagick (for example), there would be some shorter name - such as 'magick' - and it would be lower case . On 29/05/2018 08:58, Peter Otten wrote: Paul

Re: Re: Re: The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

tml#frequently-used-arguments>. Is this equivalent? p = subprocess.Popen('display',  + imagepath) so p = subprocess.Popen('display',  'test.png') On 30/05/2018 03:04, Ian Kelly wrote: On Sat, May 26, 2018 at 9:17 AM, Paul St George wrote: Thank you. You

Re: Re: The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

he name of my favourite viewer (for example: ‘ImageMagick’). On 30/05/2018 02:31, Steven D'Aprano wrote: On Tue, 29 May 2018 20:02:22 +0200, Paul St George wrote: Is there, somewhere, a list of viewers and their names (for the purposes of this script)? Do you mean a list of programs cap

Re: Re: Re: The PIL show() method looks for the default viewer. How do I change this to a different viewer (of my choice)?

That's what I wanted! But, I didn't know the question because I didn't know the answer. On 30/05/2018 23:09, Karsten Hilbert wrote: On Wed, May 30, 2018 at 11:01:17PM +0200, Peter J. Holzer wrote: On 2018-05-30 22:08:45 +0200, Paul St George wrote: Ha! No, my question wa

FULLSCREEN and DOUBLEBUF

, I can use screen = pygame.display.set_mode((screen_width,screen_height),pygame.DOUBLEBUF) to set DOUBLEBUF But how do I set both FULLSCREEN and DOUBLEBUF? And, how can I test or check that DOUBLEBUF is set? -- Paul St George http://www.paulstgeorge.com http://www.devices-of-wonder.com -- https

Re: Re: FULLSCREEN and DOUBLEBUF

or DOUBLEBUF. No errors were reported, but how would I check that DOUBLEBUF had been set? Is there a general rule, such as replace 'set_something' with 'get_something'? Paul St George On 07/06/2018 19:56, Chris Angelico wrote: On Fri, Jun 8, 2018 at 3:12 AM, Paul St Geo

Re: Re: FULLSCREEN and DOUBLEBUF

On 08/06/18 09:00, Paul St George wrote: Excellent. Now I know what to do in this instance and I understand the principle. I hesitantly tried this: screen = pygame.display.set_mode((720,480), pygame.FULLSCREEN | pygame.DOUBLEBUF) Hesitantly because I expected the *bitwise or

Re: Re: FULLSCREEN and DOUBLEBUF

To recap: this thread started with a question. How do I know whether DOUBLEBUF has been set with:     screen = pygame.display.set_mode((720,480), pygame.DOUBLEBUF | pygame.FULLSCREEN) On 09/06/2018 22:04, Mark Lawrence wrote: On 09/06/18 20:31, Paul St George wrote: print

Re: Re: Re: FULLSCREEN and DOUBLEBUF

Paul St George wrote: So... print pygame.display.get_surface() gives and print screen.get_flags() gives -2147483648 To recap: this thread started with a question. How do I know whether DOUBLEBUF has been set with: screen = pygame.display.set_mode((720,480), pygame.DOUBLEBUF

Re: Re: FULLSCREEN and DOUBLEBUF

Dennis Lee Bieber wrote: Both may be dependent upon the actual hardware graphics board and the drivers for said board. On 11/06/2018 01:47, Gregory Ewing wrote: My guess is that if your surface is not fullscreen or is not a hardware surface, then you're always drawing into an ofscreen bu

Re: Python list vs google group

On 15/06/2018 17:33, T Berger wrote: On Friday, June 15, 2018 at 12:14:30 PM UTC-4, Mark Lawrence wrote: On 15/06/18 16:47, T Berger wrote: On Friday, June 15, 2018 at 11:31:47 AM UTC-4, Alister wrote: it certainly seems to be the source of most SPAM as such some users of this list/newsgroup

Re: Feeding the trolls

On 21/06/2018 10:05, Anssi Saari wrote: D'Arcy Cain writes: One of these days I will have to figure out how to block replies to the trolls as well. Benefit of reading the mailing list via nntp (i.e. gmane): can easily score down follow-ups to annoying people in addition to their posts. Well,

Accessing the Python list

Understanding and having an interest in Python does not imply knowledge of Usenet, mailing lists, NNTP, gateways, gmane, bottom-posting, vanilla-flopping, /et al/. But, knowledge of these seems to be needed (or is at least useful) in order to fully benefit from the Python list. Would it be a

Accessing the Python list

From: Paul St George Understanding and having an interest in Python does not imply knowledge of Usenet, mailing lists, NNTP, gateways, gmane, bottom-posting, vanilla-flopping, /et al/. But, knowledge of these seems to be needed (or is at least useful) in order to fully benefit from the Python

Python in Blender. Writing information to a file.

I am using Python 3.5 within Blender. I want to collect values of the current settings and then write all the results to a file. I can see the settings and the values in the Python console by doing this for each of the settings | | |print(“Focal length:”,bpy.context.object.data.lens)| ---Foc

Re: Re: Python in Blender. Writing information to a file.

On 08/08/2019 10:18, Peter Otten wrote: Paul St George wrote: I am using Python 3.5 within Blender. I want to collect values of the current settings and then write all the results to a file. I can see the settings and the values in the Python console by doing this for each of the settings

Re: Python in Blender. Writing information to a file.

On 09/08/2019 04:09, Cameron Simpson wrote: On 08Aug2019 22:42, Paul St George wrote: On 08/08/2019 10:18, Peter Otten wrote: The print() function has a keyword-only file argument. So: with open(..., "w") as outstream:     print("Focal length:", bpy.context.object.data.l

String slices

In the code (below) I want a new line like this: Plane rotation X: 0.0 Plane rotation Y: 0.0 Plane rotation Z: 0.0 But not like this: Plane rotation X: 0.0 Plane rotation Y: 0.0 Plane rotation Z: 0.0 Is it possible? (I am using Python 3.5 within Blender.) # import os outstream = open(os.path

Re: Re: Python in Blender. Writing information to a file.

On 09/08/2019 15:59, Rhodri James wrote: On 09/08/2019 14:54, Paul St George wrote: On 09/08/2019 04:09, Cameron Simpson wrote: On 08Aug2019 22:42, Paul St George wrote: On 08/08/2019 10:18, Peter Otten wrote: The print() function has a keyword-only file argument. So: with open(..., &q

Re: Re: String slices

On 09/08/2019 16:29, Rhodri James wrote: On 09/08/2019 15:13, Paul St George wrote: In the code (below) I want a new line like this: Plane rotation X: 0.0 Plane rotation Y: 0.0 Plane rotation Z: 0.0 But not like this: Plane rotation X: 0.0 Plane rotation Y: 0.0 Plane rotation Z: 0.0 Is it

Re: Re: String slices

On 10/08/2019 17:35, Dennis Lee Bieber wrote: On Sat, 10 Aug 2019 11:45:43 +0200, "Peter J. Holzer" declaimed the following: There are of course many variants to all three methods. And then one can get downright nasty... X = 3.14 Y = 2.78 Z = 6.226E23 print("".join(["Plane rotation

absolute path to a file

ses image02.tif saved at //../images/image02.tif which is at //images/image02.tif But I want an absolute path such as: ---Plane uses image01.tif saved at /Users/Lion/Desktop/test8/image01.tif ---Plane uses image02.tif saved at /Users/Lion/Desktop/images/image02.tif If it is relevant, my files are on a M

Re: Re: absolute path to a file

lso accepts a Pathlike object. Thanks for this. I changed my code to use your suggestion which seems to be better for the situation where I used resolve() before. -- Paul St George http://www.paulstgeorge.com http://www.devices-of-wonder.com +44(0)7595 37 1302 -- https://mail.python.org/mailman/listinfo/python-list

Re: absolute path to a file

On 16/08/2019 18:37, Chris Angelico wrote: On Sat, Aug 17, 2019 at 2:27 AM Paul St George wrote: BUT does not work with | print('test2:',os.path.realpath(n.image.filepath))| This returns only |/image01.tif| Notes: Chris, I only mention the extra leading slash on my Mac in c

Re: absolute path to a file

On 17/08/2019 01:07, Gregory Ewing wrote: On Sat, Aug 17, 2019 at 2:27 AM Paul St George wrote: BUT does not work with | print('test2:',os.path.realpath(n.image.filepath))| This returns only |/image01.tif| What does n.image.filepath look like on its own? If it starts with a lea

Re: absolute path to a file

On 17/08/2019 15:37, Peter Otten wrote: Paul St George wrote: Can someone please tell me how to get the absolute path to a file? I have tried os.path.abspath. In the code below I have a problem in the final line (15). # |import bpy|| Is this blender? If so the "//" prefix sta

Re: absolute path to a file

On 17/08/2019 16:32, Dennis Lee Bieber wrote: On Sat, 17 Aug 2019 11:51:47 +0200, Paul St George declaimed the following: print('Track E from Track B:',os.path.realpath(n.image.filepath[1:])) ---Track E from Track B: /image01.tif Just for giggles, what happens if y

Re: absolute path to a file

On 17/08/2019 15:37, Peter Otten wrote: Paul St George wrote: Can someone please tell me how to get the absolute path to a file? I have tried os.path.abspath. In the code below I have a problem in the final line (15). # |import bpy|| Is this blender? If so the "//" prefix sta

Re: absolute path to a file

On 18/08/2019 02:03, Cameron Simpson wrote: On 17Aug2019 11:51, Paul St George wrote: print('Track D  from Track B:',os.path.realpath(n.image.filepath)) ---Track D  from Track B: /image01.tif print('Track E  from Track B:',os.path.realpath(n.image.filepath[1:])) ---T

Re: absolute path to a file

On 19/08/2019 01:31, Cameron Simpson wrote: Paul, I can see we must train you in the interleaved response style :-) On 18Aug2019 17:29, Paul St George wrote: On 18/08/2019 02:03, Cameron Simpson wrote: 1: Is image01.tif a real existing file when you ran this code? Yes. image01.tif is real

Re: absolute path to a file

On 19/08/2019 14:16, Cameron Simpson wrote: On 19Aug2019 08:52, Paul St George wrote: On 19/08/2019 01:31, Cameron Simpson wrote: On 18Aug2019 17:29, Paul St George wrote: On 18/08/2019 02:03, Cameron Simpson wrote: 1: Is image01.tif a real existing file when you ran this code? Yes. image01

Re: absolute path to a file

On 20/08/2019 11:43, Cameron Simpson wrote: Please remember to CC the list. Instead of 'Post a followup to this newsgroup' or 'To: python-list@python.org'? On 19Aug2019 22:06, Paul St George wrote: On 19/08/2019 14:16, Cameron Simpson wrote: [...] There's a

Re: absolute path to a file

On 21/08/2019 04:09, Grant Edwards wrote: On 2019-08-21, Richard Damon wrote: I think gmane feed the newsgroup comp.lang.python which feeds python-list@python.org. No, gmane is a gateway to python-list@python.org. -- Grant I use https://mail.python.org/pipermail/python-list/ to confirm tha

Newbie question about Python syntax

I have the Python API for the Map Value Node here: . All well and good. Now I just want to write a simple line of code such as: import bpy ... >>>print(bpy.types.CompositorNodeMapValue.max[0]) If this works, I will d

Re: Newbie question about Python syntax

On 22/08/2019 11:49, Cameron Simpson wrote: On 22Aug2019 09:34, Paul St George wrote: I have the Python API for the Map Value Node here: <https://docs.blender.org/api/current/bpy.types.CompositorNodeMapValue.html>. All well and good. Now I just want to write a simple line of code su

Re: Newbie question about Python syntax

On 22/08/2019 20:02, Terry Reedy wrote: On 8/22/2019 3:34 AM, Paul St George wrote: I have the Python API for the Map Value Node here: <https://docs.blender.org/api/current/bpy.types.CompositorNodeMapValue.html>. All well and good. Now I just want to write a simple line of code su

Re: Newbie question about Python syntax

On 22/08/2019 23:21, Kyle Stanley wrote: [snip] The tutorial that Terry was referring to was the one on docs.python.org, here's a couple of links for the sections he was referring to: Full section on classes: https://docs.python.org/3/tutorial/classes.html Section on instantiating objects from

Re: Newbie question about Python syntax

On 24/08/2019 01:23, Cameron Simpson wrote: On 23Aug2019 13:49, Paul St George wrote: Context: I am using Python to interrogate the value of some thing in Blender (just as someone else might want to use Python to look at an email in a Mail program or an image in Photoshop). Assumptions: So

Re: Newbie question about Python syntax

On 25/08/2019 02:39, Cameron Simpson wrote: On 24Aug2019 21:52, Paul St George wrote: [snip]> Aside from "map" being a poor name (it is also a builtin Python function), it seems that one creates one of these to control how some rendering process is done. The class refer