Hidden imports not found with pydicom 3

[bersbersbers]

Describe the bug

• Which hook/library isn't working? pydicom
• Does the error get raised while building or when running? Warning when building, error when running.

To Reproduce

A minimal example file:

from pydicom import dcmread
dcmread("")

PyInstaller command:

pyinstaller test.py

Error:

(.venv) C:\Code\project>dist\test\test.exe
Traceback (most recent call last):
  File "C:\ws\project\test.py", line 1, in <module>
    from pydicom import dcmread
  File "PyInstaller\loader\pyimod02_importers.py", line 378, in exec_module
  File "pydicom\__init__.py", line 31, in <module>
  File "PyInstaller\loader\pyimod02_importers.py", line 378, in exec_module
  File "pydicom\dataelem.py", line 17, in <module>
  File "PyInstaller\loader\pyimod02_importers.py", line 378, in exec_module
  File "pydicom\config.py", line 367, in <module>
  File "PyInstaller\loader\pyimod02_importers.py", line 378, in exec_module
  File "pydicom\pixel_data_handlers\__init__.py", line 6, in <module>
  File "PyInstaller\loader\pyimod02_importers.py", line 378, in exec_module
  File "pydicom\pixels\__init__.py", line 3, in <module>
  File "PyInstaller\loader\pyimod02_importers.py", line 378, in exec_module
  File "pydicom\pixels\decoders\__init__.py", line 3, in <module>
  File "PyInstaller\loader\pyimod02_importers.py", line 378, in exec_module
  File "pydicom\pixels\decoders\base.py", line 1805, in <module>
  File "pydicom\pixels\common.py", line 130, in add_plugins
  File "pydicom\pixels\common.py", line 83, in add_plugin
  File "importlib\__init__.py", line 90, in import_module
ModuleNotFoundError: No module named 'pydicom.pixels.decoders.gdcm'
[PYI-32016:ERROR] Failed to execute script 'test' due to unhandled exception!

Expected behavior No ModuleNotFoundError

Desktop (please complete the following information):

• OS: Windows
• Python Version: Python 3.12
• Version of pyinstaller-hooks-contrib: 2024.8
• Version of PyInstaller: 6.10.0

[bwoodsend]

I think Rok's already working on that one. It got flagged up yesterday: https://github.com/pyinstaller/pyinstaller-hooks-contrib/pull/790#issuecomment-2339075464

[rokm]

Yeah, I'm almost done with sorting this one out.