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Force mat_wrapper import to satisfy dependencies for MatLike alias#23821

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asmorkalov merged 1 commit intoopencv:4.xfrom
asmorkalov:as/python_types_extra_imports
Jun 16, 2023
Merged

Force mat_wrapper import to satisfy dependencies for MatLike alias#23821
asmorkalov merged 1 commit intoopencv:4.xfrom
asmorkalov:as/python_types_extra_imports

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@asmorkalov asmorkalov commented Jun 16, 2023 •
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Solves:

Python 3.9.5 (default, Nov 23 2021, 15:27:38) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/ksenia/Projects/opencv-build-3.9/install/lib/python3.9/site-packages/cv2/__init__.py", line 181, in <module>
    bootstrap()
  File "/home/ksenia/Projects/opencv-build-3.9/install/lib/python3.9/site-packages/cv2/__init__.py", line 175, in bootstrap
    if __load_extra_py_code_for_module("cv2", submodule, DEBUG):
  File "/home/ksenia/Projects/opencv-build-3.9/install/lib/python3.9/site-packages/cv2/__init__.py", line 28, in __load_extra_py_code_for_module
    py_module = importlib.import_module(module_name)
  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/home/ksenia/Projects/opencv-build-3.9/install/lib/python3.9/site-packages/cv2/typing/__init__.py", line 73, in <module>
    MatLike = typing.Union[cv2.mat_wrapper.Mat, numpy.ndarray[typing.Any, numpy.dtype[numpy.generic]]]
AttributeError: partially initialized module 'cv2' has no attribute 'mat_wrapper' (most likely due to a circular import)

Pull Request Readiness Checklist

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  • I agree to contribute to the project under Apache 2 License.
  • To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
  • The PR is proposed to the proper branch
  • There is a reference to the original bug report and related work
  • There is accuracy test, performance test and test data in opencv_extra repository, if applicable
    Patch to opencv_extra has the same branch name.
  • The feature is well documented and sample code can be built with the project CMake

@asmorkalov asmorkalov added this to the 4.8.0 milestone Jun 16, 2023
@asmorkalov asmorkalov requested a review from VadimLevin June 16, 2023 18:52
@asmorkalov asmorkalov self-assigned this Jun 16, 2023
@asmorkalov asmorkalov added the bug label Jun 16, 2023
@asmorkalov asmorkalov merged commit f2f0025 into opencv:4.x Jun 16, 2023
@VadimLevin VadimLevin mentioned this pull request Jun 20, 2023
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@asmorkalov asmorkalov mentioned this pull request Jul 27, 2023
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