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python: restore sys.path in bootstrap()

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- multiprocessing need to start from bootstrap code
- loading may fail due to missing os.add_dll_directory() calls
This commit is contained in:
Alexander Alekhin 2020-11-26 12:24:15 +00:00
parent f4f462c50b
commit 36d771affc
1 changed files with 6 additions and 0 deletions
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6
modules/python/package/cv2/__init__.py
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@ -18,6 +18,10 @@ except ImportError:
def bootstrap(): def bootstrap():
import sys import sys
import copy
save_sys_path = copy.copy(sys.path)
if hasattr(sys, 'OpenCV_LOADER'): if hasattr(sys, 'OpenCV_LOADER'):
print(sys.path) print(sys.path)
raise ImportError('ERROR: recursion is detected during loading of "cv2" binary extensions. Check OpenCV installation.') raise ImportError('ERROR: recursion is detected during loading of "cv2" binary extensions. Check OpenCV installation.')
@ -85,6 +89,8 @@ def bootstrap():
del sys.modules['cv2'] del sys.modules['cv2']
import cv2 import cv2
sys.path = save_sys_path # multiprocessing should start from bootstrap code (https://github.com/opencv/opencv/issues/18502)
try: try:
import sys import sys
del sys.OpenCV_LOADER del sys.OpenCV_LOADER