Chris Green <cl@isbd.net> writes: Where can I find out what

I need to do?

In the World-Wide Web! But don't worry, I have already gone
to the World-Wide Web and got that piece of information for you!
Apparently (I have not tested it), it's "Image.Resampling.LANCZOS"
(after "from PIL import Image"). (I have not tested this, only
read it on the World-Wide Web.) Should also be in the documentation
of PIL.

The World Wide Web (WWW), commonly known as the Web, is an
information system enabling documents and other web resources
to be accessed over the Internet. You may ask the party
that now is providing Usenet access to you, whether it also
supports the Internet. Then, you can use "search engines" that
will find pieces of information from the Web, the so-called
"Web pages", that contain a certain text. I carefully typed
that "Resampling.LANCZOS" into one such search engine and
then got that piece of information.

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I am using Image from PIL and I'm getting a deprecation warning as
follows:-

/home/chris/bin/picShrink.py:80: DeprecationWarning: ANTIALIAS is deprecated and will be removed in Pillow 10 (2023-07-01). Use Resampling.LANCZOS instead.


The code is very simple:-

...
...
from PIL import Image
...
...
im = Image.open(srcFile)
im.thumbnail(size, Image.ANTIALIAS)
im.save(dstFile, "JPEG")


But if I change line 80 to:-

im.thumbnail(size, Resampling.LANCZOS)

I simply get an error as follows:-

picShrink.py
Traceback (most recent call last):
File "/home/chris/bin/picShrink.py", line 80, in <module>
im.thumbnail(size, Resampling.LANCZOS)
NameError: name 'Resampling' is not defined


So, presumably there's more I need to change. Where can I find out what
I need to do?

--
Chris Green
·

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On Sun, 5 Feb 2023 at 07:52, Chris Green <cl@isbd.net> wrote:

I am using Image from PIL and I'm getting a deprecation warning as
follows:-

/home/chris/bin/picShrink.py:80: DeprecationWarning: ANTIALIAS is deprecated and will be removed in Pillow 10 (2023-07-01). Use Resampling.LANCZOS instead.

im = Image.open(srcFile)
im.thumbnail(size, Image.ANTIALIAS)
im.save(dstFile, "JPEG")

im.thumbnail(size, Resampling.LANCZOS)

I simply get an error as follows:-

picShrink.py
Traceback (most recent call last):
File "/home/chris/bin/picShrink.py", line 80, in <module>
im.thumbnail(size, Resampling.LANCZOS)
NameError: name 'Resampling' is not defined

It looks like Resampling is an enumeration. The warning said
"ANTIALIAS" as a bare name, and you were using Image.ANTIALIAS; it
looks like Image.Resampling.LANCZOS has the same effect.

In fact, it looks like they're actually the same value:

Image.ANTIALIAS is Image.Resampling.LANCZOS

<stdin>:1: DeprecationWarning: ANTIALIAS is deprecated and will be
removed in Pillow 10 (2023-07-01). Use Resampling.LANCZOS instead.
True

So that should be a safe move forward.

ChrisA

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Chris Green schreef op 4/02/2023 om 16:17:

I am using Image from PIL and I'm getting a deprecation warning as
follows:-

/home/chris/bin/picShrink.py:80: DeprecationWarning: ANTIALIAS is deprecated and will be removed in Pillow 10 (2023-07-01). Use Resampling.LANCZOS instead.

But if I change line 80 to:-

im.thumbnail(size, Resampling.LANCZOS)

I simply get an error as follows:-

picShrink.py
Traceback (most recent call last):
File "/home/chris/bin/picShrink.py", line 80, in <module>
im.thumbnail(size, Resampling.LANCZOS)
NameError: name 'Resampling' is not defined

So, presumably there's more I need to change. Where can I find out what
I need to do?

There's some information about changes in constants in the release notes
for version 9.1.0, see https://pillow.readthedocs.io/en/stable/releasenotes/9.1.0.html. At
first sight it looks like that indicates you have to do either

    from PIL import Image.Resampling as Resampling
    ...
    im.thumbnail(size, Resampling.LANCZOS)

or

    from PIL import Image.Resampling
    ...
    im.thumbnail(size, Image.Resampling.LANCZOS)

BUT according to the release notes of version 9.4.0 (see https://pillow.readthedocs.io/en/stable/releasenotes/9.4.0.html#restored-image-constants)
the constants in Image will remain (it's not clear to me if the ones in Image.Resample will remain too). As far as I can see ANTIALIAS is still deprecated in favor of LANCZOS though. All in all, it looks like the way
to go is to use Image.LANCZOS. In versions 9.1.0 up to but not including
9.4.0 that will give you a deprecation warning but that can safely be
ignored.

--
"Life ain't no fairy tale
Just give me another ale
And I'll drink to Rock 'n Roll"
-- Barkeep (The Scabs)

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Roel Schroeven <roel@roelschroeven.net> wrote:

Chris Green schreef op 4/02/2023 om 16:17:

I am using Image from PIL and I'm getting a deprecation warning as follows:-

/home/chris/bin/picShrink.py:80: DeprecationWarning: ANTIALIAS is deprecated

and will be removed in Pillow 10 (2023-07-01). Use Resampling.LANCZOS instead.

But if I change line 80 to:-

im.thumbnail(size, Resampling.LANCZOS)

I simply get an error as follows:-

picShrink.py
Traceback (most recent call last):
File "/home/chris/bin/picShrink.py", line 80, in <module>
im.thumbnail(size, Resampling.LANCZOS)
NameError: name 'Resampling' is not defined

So, presumably there's more I need to change. Where can I find out what
I need to do?

There's some information about changes in constants in the release notes
for version 9.1.0, see https://pillow.readthedocs.io/en/stable/releasenotes/9.1.0.html. At
first sight it looks like that indicates you have to do either

    from PIL import Image.Resampling as Resampling
    ...
    im.thumbnail(size, Resampling.LANCZOS)

or

    from PIL import Image.Resampling
    ...
    im.thumbnail(size, Image.Resampling.LANCZOS)

BUT according to the release notes of version 9.4.0 (see https://pillow.readthedocs.io/en/stable/releasenotes/9.4.0.html#restored-image-constants)
the constants in Image will remain (it's not clear to me if the ones in Image.Resample will remain too). As far as I can see ANTIALIAS is still deprecated in favor of LANCZOS though. All in all, it looks like the way
to go is to use Image.LANCZOS. In versions 9.1.0 up to but not including 9.4.0 that will give you a deprecation warning but that can safely be ignored.

Thank you Roel (and Chris in the previous reply) for your helpful
explanations, it's all cleared up now.

--
Chris Green
·

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