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'''
OpenCV Python binary extension loader
'''
import os
import sys
try:
import numpy
import numpy.core.multiarray
except ImportError:
print('OpenCV bindings requires "numpy" package.')
print('Install it via command:')
print(' pip install numpy')
raise
# TODO
# is_x64 = sys.maxsize > 2**32
def bootstrap():
import sys
import copy
save_sys_path = copy.copy(sys.path)
if hasattr(sys, 'OpenCV_LOADER'):
print(sys.path)
raise ImportError('ERROR: recursion is detected during loading of "cv2" binary extensions. Check OpenCV installation.')
sys.OpenCV_LOADER = True
DEBUG = False
if hasattr(sys, 'OpenCV_LOADER_DEBUG'):
DEBUG = True
import platform
if DEBUG: print('OpenCV loader: os.name="{}" platform.system()="{}"'.format(os.name, str(platform.system())))
LOADER_DIR=os.path.dirname(os.path.abspath(__file__))
PYTHON_EXTENSIONS_PATHS = []
BINARIES_PATHS = []
g_vars = globals()
l_vars = locals()
if sys.version_info[:2] < (3, 0):
from . load_config_py2 import exec_file_wrapper
else:
from . load_config_py3 import exec_file_wrapper
def load_first_config(fnames, required=True):
for fname in fnames:
fpath = os.path.join(LOADER_DIR, fname)
if not os.path.exists(fpath):
if DEBUG: print('OpenCV loader: config not found, skip: {}'.format(fpath))
continue
if DEBUG: print('OpenCV loader: loading config: {}'.format(fpath))
exec_file_wrapper(fpath, g_vars, l_vars)
return True
if required:
raise ImportError('OpenCV loader: missing configuration file: {}. Check OpenCV installation.'.format(fnames))
load_first_config(['config.py'], True)
load_first_config([
'config-{}.{}.py'.format(sys.version_info[0], sys.version_info[1]),
'config-{}.py'.format(sys.version_info[0])
], True)
if DEBUG: print('OpenCV loader: PYTHON_EXTENSIONS_PATHS={}'.format(str(l_vars['PYTHON_EXTENSIONS_PATHS'])))
if DEBUG: print('OpenCV loader: BINARIES_PATHS={}'.format(str(l_vars['BINARIES_PATHS'])))
for p in reversed(l_vars['PYTHON_EXTENSIONS_PATHS']):
sys.path.insert(1, p)
if os.name == 'nt':
if sys.version_info[:2] >= (3, 8): # https://github.com/python/cpython/pull/12302
for p in l_vars['BINARIES_PATHS']:
try:
os.add_dll_directory(p)
except Exception as e:
if DEBUG: print('Failed os.add_dll_directory(): '+ str(e))
pass
os.environ['PATH'] = ';'.join(l_vars['BINARIES_PATHS']) + ';' + os.environ.get('PATH', '')
if DEBUG: print('OpenCV loader: PATH={}'.format(str(os.environ['PATH'])))
else:
# amending of LD_LIBRARY_PATH works for sub-processes only
os.environ['LD_LIBRARY_PATH'] = ':'.join(l_vars['BINARIES_PATHS']) + ':' + os.environ.get('LD_LIBRARY_PATH', '')
if DEBUG: print('OpenCV loader: replacing cv2 module')
del sys.modules['cv2']
import cv2
sys.path = save_sys_path # multiprocessing should start from bootstrap code (https://github.com/opencv/opencv/issues/18502)
try:
import sys
del sys.OpenCV_LOADER
except:
pass
if DEBUG: print('OpenCV loader: DONE')
bootstrap()
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