Build failed - Pillow library

[mr_alex]

What I’m trying to do:
Test tesseract and easyocr

What I’ve tried and what’s not working:
Trying to add the PIL library via a simple:

from PIL import Image,
...

And getting this error after adding the PIL library:

Installing custom packages...
Collecting easyocr
  Downloading easyocr-1.7.0-py3-none-any.whl (2.9 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2.9/2.9 MB 36.9 MB/s eta 0:00:00
Collecting tesseract
  Downloading tesseract-0.1.3.tar.gz (45.6 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 45.6/45.6 MB 52.7 MB/s eta 0:00:00
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'done'
ERROR: Could not find a version that satisfies the requirement PIL (from versions: none)
ERROR: No matching distribution found for PIL
Error: Build failed
Retry build

[ianb]

try installing Pillow instead

@mr_alex

from PIL import Image,
...

Still use this code though, Pillow replaced PIL many moons ago.

[mr_alex]

Thanks, I removed everything and added only the Pillow library but the message “Build failed” persists even after multiple retries.

[ianb]

Yeah I just tried with a new app and nearly every version and none of them will build.

The build process (byo packages) is still in beta, so maybe the Anvil staff might know better why this particular library fails, it’s a pretty commonly used library on PyPi .

[mr_alex]

Yeah, it’s concerning because one of the example apps uses the PIL library and I’m following their example for using that library:

Learning to use Pillow through my love of crafting

[ianb]

Probably because in the default (not 3.10 beta) version of Anvil server modules, Pillow 9.0.1 is already installed by the anvil staff into the standard Full Python interpreter:

List of Packages

If tesseract and easyocr are something you really need and they will run in python 3.8, then you could email the staff at support@anvil.works and tell them the use case and the issue with the 3.10 beta and they will get it installed for you usually pretty quick.

[mr_alex]

@ianb

tesseract and easyocr

I removed everything except the Pillow library and it doesn’t build. Maybe my app is corrupt?

[ianb]

Before the 3.10 (Beta), there was only “Full Python 3” like in the list above, and there wasn’t any build process. You can still select “Full Python 3” and it will already have Pillow installed (that link I posted is the big list of everything that’s installed already by Anvil, there is no build process)

In the list it looks like tesseract and easyocr are not installed, but pytesseract and pyocr are.

You can email the staff and ask them to add tesseract and easyocr to “Full Python 3”.

[mr_alex]

Thanks @ianb PIL is loading up fine now using Full Python3.

However, using an Image object is now failing on a simple jpg or png file:

from PIL import Image
...
image_object = Image.open(image)
Error: 'StreamingMedia' object has no attribute 'read'

This is using the standard FileUploader component. I’m able to use this component successfully to store the image in a data table, but PIL is still causing issues opening the file. I’ve tried using BytesIO as recommended elsewhere to wrap the call but it still throws the same error.

Also not able to import the Pillow library:

[ianb]

Last thing first, you still use import PIL like normal, Pillow is just a fork of the original PIL library that is no longer maintained (for years). So you don’t change any code, only the name of the library thats installed by pip changes to pip install Pillow instead of PIL.

From looking at the code in the clone of their app this is how @eli originally used PIL in the example link you posted above.

[mr_alex]

That did it, and pytesseract is working as well, thank you!

[ianb]

So It looks like our first inclinations were correct, and this was just an issue with the package manager being in beta. It looks like the anvil staff has now fixed the issue with installing Pillow

Python 3.10 Build pipeline issues?

Hi @mark.breuss (and others who have had this issue), Sorry about this - it should now be fixed! For those interested in the gory details: We’re still ironing out the wrinkles in the Custom Packages install process, and today we learned that Podman doesn’t fully clean up build containers when a build fails (and possibly even when it succeeds), leaking a small amount of storage every time until the disk space runs out. We also learned that we don’t have sufficient monitoring on that particular …

I tested installing Pillow on a fresh app and it works, if you get an error about security, you can instead install the requests module to a version >= 2.31.0 before installing other packages.