Update packtools to 4.16.1 to fix thumbnail creation error

[Copilot]

O que esse PR faz?

Atualiza packtools de 2.9.5 para 4.16.1, corrigindo o ValueError: image has wrong mode que ocorre ao gerar miniaturas de imagens com modos incompatíveis (P, CMYK, I, F, etc.) durante a otimização de pacotes SPS.

Onde a revisão poderia começar?

requirements.txt — única alteração.

Como este poderia ser testado manualmente?

Processar um pacote SPS contendo imagens com modo P (paleta) ou CMYK e verificar que o optimize_package_task_id completa sem erro.

Algum cenário de contexto que queira dar?

O PIL não suporta thumbnail()/resize() com resampler LANCZOS em imagens com certos modos de cor. O packtools 4.16.1 converte a imagem para RGB/RGBA antes do resize, resolvendo o problema na raiz.

ValueError: image has wrong mode
  File "packtools/utils.py", line 421, in get_thumbnail_bytes
    self._image_object.thumbnail(self.thumbnail_size)

Screenshots

N/A

Quais são tickets relevantes?

scieloorg/ajuda#15

Referências

• packtools 4.16.1

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Erro do optimiser do packtools ao criar miniatura</issue_title>
<issue_description>### Descrição do problema

O packtools foi corrigido. Use a versão 4.16.1.

obtive isso ao usar optimiser do packtools [2026-01-09 21:58:44,242] {taskinstance.py:901} INFO - Executing <Task(ShortCircuitOperator): optimize_package_task_id> on 2026-01-09T20:31:57.066931+00:00
[2026-01-09 21:58:44,250] {standard_task_runner.py:54} INFO - Started process 4137959 to run task
[2026-01-09 21:58:44,348] {standard_task_runner.py:77} INFO - Running: ['airflow', 'run', 'sync_documents_to_kernel', 'optimize_package_task_id', '2026-01-09T20:31:57.066931+00:00', '--job_id', '405724', '--pool', 'default_pool', '--raw', '-sd', 'DAGS_FOLDER/sync_documents_to_kernel.py', '--cfg_path', '/tmp/tmpp8qn7kqa']
[2026-01-09 21:58:44,352] {standard_task_runner.py:78} INFO - Job 405724: Subtask optimize_package_task_id
[2026-01-09 21:58:44,750] {logging_mixin.py:112} INFO - Running %s on host %s <TaskInstance: sync_documents_to_kernel.optimize_package_task_id 2026-01-09T20:31:57.066931+00:00 [running]> airflow-778f6d87b4-t6sx2
[2026-01-09 21:58:44,979] {utils.py:792} INFO - Generating new SciELO Publishing Package /tmp/tmpa1r6o4ki/2026-01-05-13-30-59-496018_bjos_v24.zip
[2026-01-09 21:58:44,980] {utils.py:803} INFO - Optimizing XML file 1677-3225-bjos-24-e256503.xml [0/1]
[2026-01-09 21:58:45,778] {taskinstance.py:1150} ERROR - image has wrong mode
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/airflow/models/taskinstance.py", line 984, in _run_raw_task
    result = task_copy.execute(context=context)
  File "/usr/local/lib/python3.7/site-packages/airflow/operators/python_operator.py", line 158, in execute
    condition = super(ShortCircuitOperator, self).execute(context)
  File "/usr/local/lib/python3.7/site-packages/airflow/operators/python_operator.py", line 113, in execute
    return_value = self.execute_callable()
  File "/usr/local/lib/python3.7/site-packages/airflow/operators/python_operator.py", line 118, in execute_callable
    return self.python_callable(*self.op_args, **self.op_kwargs)
  File "/usr/local/airflow/dags/sync_documents_to_kernel.py", line 95, in optimize_package
    _sps_package, new_sps_zip_dir
  File "/usr/local/airflow/dags/operations/sync_documents_to_kernel_operations.py", line 136, in optimize_sps_pkg_zip_file
    preserve_files=False
  File "/usr/local/lib/python3.7/site-packages/packtools/utils.py", line 807, in optimise
    new_package_file_path, xml_filename, zipped_filenames
  File "/usr/local/lib/python3.7/site-packages/packtools/utils.py", line 714, in _optimise_to_zipfile
    optimised_xml = xml_web_optimiser.get_xml_file()
  File "/usr/local/lib/python3.7/site-packages/packtools/utils.py", line 636, in get_xml_file
    image_filename, self._add_assets_thumbnails
  File "/usr/local/lib/python3.7/site-packages/packtools/utils.py", line 600, in _get_optimised_image_with_filename
    return add_image(image_filename)
  File "/usr/local/lib/python3.7/site-packages/packtools/utils.py", line 570, in _add_assets_thumbnails
    thumbnail_bytes = web_image_generator.get_thumbnail_bytes()
  File "/usr/local/lib/python3.7/site-packages/packtools/utils.py", line 421, in get_thumbnail_bytes
    self._image_object.thumbnail(self.thumbnail_size)
  File "/usr/local/lib/python3.7/site-packages/PIL/Image.py", line 2619, in thumbnail
    im = self.resize(size, resample, box=box, reducing_gap=reducing_gap)
  File "/usr/local/lib/python3.7/site-packages/PIL/Image.py", line 2193, in resize
    return self._new(self.im.resize(size, resample, box))
ValueError: image has wrong mode
[2026-01-09 21:58:45,801] {taskinstance.py:1194} INFO - Marking task as FAILED. dag_id=sync_documents_to_kernel, task_id=optimize_package_task_id, execution_date=20260109T203157, start_date=20260109T215843, end_date=20260109T215845
[2026-01-09 21:58:48,871] {local_task_job.py:102} INFO - Task exited with return code 1

Passos para reproduzir o problema

1. Acesse a página ...
2. Clique no link ...
3. Role a página até ...
4. Observe o erro apresentado

Comportamento esperado

...

Screenshots ou vídeos

n/a

Anexos

scieloorg/ajuda#15

Ambiente utilizado

opac-airflow v1.0.0-rc84

Diagnóstico

Análise do Erro

O erro ValueError: image has wrong mode ocorre no PIL/Pillow ao tentar redimensionar uma imagem para gerar o thumbnail. Isso geralmente acontece quando a imagem está em um modo não suportado para resize com certos resamplers — como modo P (paleta/indexed), CMYK, LA, ou I (32-bit integers).

O problema está em packtools/utils.py, linha 421:

self._image_object.thumbnail(self.thumbnail_size)

---

Causa Raiz

O PIL não consegue fazer resize com LANCZOS (ou outros res...

• Fixes Erro do optimiser do packtools ao criar miniatura #495

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