''' OpenCV Python binary extension loader ''' import os import importlib import sys __all__ = [] 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 __load_extra_py_code_for_module(base, name, enable_debug_print=False): module_name = "{}.{}".format(__name__, name) export_module_name = "{}.{}".format(base, name) native_module = sys.modules.pop(module_name, None) try: py_module = importlib.import_module(module_name) except ImportError as err: if enable_debug_print: print("Can't load Python code for module:", module_name, ". Reason:", err) # Extension doesn't contain extra py code return False if base in sys.modules and not hasattr(sys.modules[base], name): setattr(sys.modules[base], name, py_module) sys.modules[export_module_name] = py_module # If it is C extension module it is already loaded by cv2 package if native_module: setattr(py_module, "_native", native_module) for k, v in filter(lambda kv: not hasattr(py_module, kv[0]), native_module.__dict__.items()): if enable_debug_print: print(' symbol({}): {} = {}'.format(name, k, v)) setattr(py_module, k, v) return True def __collect_extra_submodules(enable_debug_print=False): def modules_filter(module): return all(( # module is not internal not module.startswith("_"), not module.startswith("python-"), # it is not a file os.path.isdir(os.path.join(_extra_submodules_init_path, module)) )) if sys.version_info[0] < 3: if enable_debug_print: print("Extra submodules is loaded only for Python 3") return [] __INIT_FILE_PATH = os.path.abspath(__file__) _extra_submodules_init_path = os.path.dirname(__INIT_FILE_PATH) return filter(modules_filter, os.listdir(_extra_submodules_init_path)) 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(os.path.realpath(__file__))) PYTHON_EXTENSIONS_PATHS = [] BINARIES_PATHS = [] g_vars = globals() l_vars = locals().copy() 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']))) applySysPathWorkaround = False if hasattr(sys, 'OpenCV_REPLACE_SYS_PATH_0'): applySysPathWorkaround = True else: try: BASE_DIR = os.path.dirname(LOADER_DIR) if sys.path[0] == BASE_DIR or os.path.realpath(sys.path[0]) == BASE_DIR: applySysPathWorkaround = True except: if DEBUG: print('OpenCV loader: exception during checking workaround for sys.path[0]') pass # applySysPathWorkaround is False for p in reversed(l_vars['PYTHON_EXTENSIONS_PATHS']): sys.path.insert(1 if not applySysPathWorkaround else 0, 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("Relink everything from native cv2 module to cv2 package") py_module = sys.modules.pop("cv2") native_module = importlib.import_module("cv2") sys.modules["cv2"] = py_module setattr(py_module, "_native", native_module) for item_name, item in filter(lambda kv: kv[0] not in ("__file__", "__loader__", "__spec__", "__name__", "__package__"), native_module.__dict__.items()): if item_name not in g_vars: g_vars[item_name] = item sys.path = save_sys_path # multiprocessing should start from bootstrap code (https://github.com/opencv/opencv/issues/18502) try: del sys.OpenCV_LOADER except Exception as e: if DEBUG: print("Exception during delete OpenCV_LOADER:", e) if DEBUG: print('OpenCV loader: binary extension... OK') for submodule in __collect_extra_submodules(DEBUG): if __load_extra_py_code_for_module("cv2", submodule, DEBUG): if DEBUG: print("Extra Python code for", submodule, "is loaded") if DEBUG: print('OpenCV loader: DONE') bootstrap()