MobileRead Forums - View Single Post - Let Calibre Use Locally Built Version of Dependency on Windows?

mwgabby-li · 04-15-2022, 01:04 AM

Thanks - that was part of the solution, but it wasn't working with just that. Just in case someone else needs to get this working, turns out I also had to modify sys.meta_path.

This is what I saw it as when Calibre is running. I guess the third entry in that list causes it to prioritize the built-in "frozen" libraries?:

Code:

sys.meta_path: [
<calibre.constants.DeVendor object at 0x000002128A2AA3A0>,
<__main__.PydImporter object at 0x000002128A22C310>,
BypyFrozenImporter with data in C:\Program Files\Calibre2\app\bin,
<class '_frozen_importlib.BuiltinImporter'>,
<class '_frozen_importlib.FrozenImporter'>,
<class '_frozen_importlib_external.PathFinder'>,
<calibre.constants.ExtensionsImporter object at 0x000002128A2B11F0>
]

To get it working quickly, in addition to modifying sys.path to have css-parser/src listed first before all imports using that module, I just did this in constants.py after the DeVendor() and ExtensionsImporter() are added:

Code:

sys.meta_path.insert(0, sys.meta_path[5])

I daresay there's probably a more elegant solution to this, but there you are.

04-15-2022, 01:04 AM	#3
mwgabby-li Junior Member Posts: 9 Karma: 10 Join Date: Jul 2020 Device: reMarkable v1	Thanks - that was part of the solution, but it wasn't working with just that. Just in case someone else needs to get this working, turns out I also had to modify sys.meta_path. This is what I saw it as when Calibre is running. I guess the third entry in that list causes it to prioritize the built-in "frozen" libraries?: Code: sys.meta_path: [ <calibre.constants.DeVendor object at 0x000002128A2AA3A0>, <__main__.PydImporter object at 0x000002128A22C310>, BypyFrozenImporter with data in C:\Program Files\Calibre2\app\bin, <class '_frozen_importlib.BuiltinImporter'>, <class '_frozen_importlib.FrozenImporter'>, <class '_frozen_importlib_external.PathFinder'>, <calibre.constants.ExtensionsImporter object at 0x000002128A2B11F0> ] To get it working quickly, in addition to modifying sys.path to have css-parser/src listed first before all imports using that module, I just did this in constants.py after the DeVendor() and ExtensionsImporter() are added: Code: sys.meta_path.insert(0, sys.meta_path[5]) I daresay there's probably a more elegant solution to this, but there you are.