Hi All,
I have an application that requires a folder of files that is effectively
an external "SDK" that can change independent of my app, and there is a
Python binding for that SDK in the form of a compiled C extension (sd.pyd).
I have written my script to dynamically resolve and import this module at
runtime and it all works great from Python. I can point it to a folder
somewhere via a command line argument and it will augment sys.path and PATH
accordingly, and successfully import the module.
When I turn my script into and executable with pyInstaller, it fails to
import my module with:
ImportError: DLL load failed while importing sd: The specified module could
not be found
I have tried manually setting the PATH and PYTHONPATH in the console and
even copying the .pyd file to be alongside the .exe itself, but nothing
works. Now the weird part. If I re-run the pyInstaller build with my
PYTHONPATH set to the location where my .pyd file resides, it creates an
executable that *does* work. So it appears that pyInstaller has its own
notion of a PYTHONPATH that can be augmented at build time but not runtime??
I do not want to bake this path into the executable, nor do I want to build
the binary file into the .exe itself because it depends on the external SDK
version I am referencing and I would like this to be dynamic. But how to I
tell a pyInstaller'd .exe about it at runtime?? Here is the code that is
doing the dynamic import in my Python module:
_WIN_SAMPLES_PATH = 'samples/win/bin'
def __get_run_path():
"""Returns the directory of this script"""
if getattr(sys, 'frozen', False):
# we are running in a bundle
#bundle_dir = sys._MEIPASS
return os.path.abspath(os.path.dirname(sys.executable))
# we are running in a normal Python environment
#bundle_dir = os.path.dirname(os.path.abspath(__file__))
return os.path.abspath(os.path.dirname(__file__))
def __resolve_sdk():
"""Sets the SDK environment variables and imports the sd module"""
sdk_root = pathlib.Path(os.environ.get('SD_SDK_ROOT', __get_run_path()))
if not sdk_root.exists() or not sdk_root.is_dir():
raise ImportError(f'{str(sdk_root)} is not a valid location. Make
sure you set %SD_SDK_ROOT% appropriately in your environment.')
# We'll fall back to this if we can't find sd.pyd in SD_SDK_ROOT
sdk_module_folder = sdk_root / _WIN_SAMPLES_PATH
# Try to find the sd.pyd file in sdk_root
try_sd_pyd = sdk_root / 'sd.pyd'
if try_sd_pyd.exists() and try_sd_pyd.is_file():
logging.debug(f"Found 'sd.pyd' in {str(sdk_root)}")
sdk_module_folder = sdk_root
else:
logging.debug(f"Failed to find 'sd.pyd' in {str(sdk_root)}. Using {
str(sdk_module_folder)} instead.")
sdk_module = sdk_module_folder / 'sd.pyd'
sdk_config = sdk_module_folder / 'sd.config'
if not sdk_module.exists() or not sdk_module.is_file():
raise ImportError(f"Failed to find 'sd.pyd' in {str(
sdk_module_folder)}! Make sure you set %SD_SDK_ROOT% appropriately in your
environment.")
# Set the SDK environment variables BEFORE attempting to import from sd
# Note that the trailing separator is required for the SDK to work
os.environ['SD_MODULE_PATH'] = str(sdk_module.parent) + '\\'
os.environ['SD_CONFIG_PATH'] = str(sdk_config)
os.environ["PATH"] += os.pathsep + str(sdk_module.parent)
module_name = 'sd'
sys.path.append(str(sdk_module.parent))
spec = importlib.util.find_spec(module_name)
if spec is not None:
module = importlib.util.module_from_spec(spec)
sys.modules[module_name] = module
spec.loader.exec_module(module)
else:
raise ImportError(f"Failed to find module {module_name}")
__resolve_sdk()
import sd
It finds the sd.pyd file dynamically and sets everything up properly, but
fails to load the .dll for some reason when turned into an .exe without the
path "baked into" the executable via PYTHONPATH.
Is there a way I can make this work with pyInstaller's heavily customized
import mechanism?
Thanks,
Mark
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