optional_imports.py

"""
Stand-alone module to provide information about whether optional deps exist.

"""

fromimportlibimportimport_module
importlogging
importsys

logger=logging.getLogger(__name__)
_not_importable=set()


defget_module(name, should_load=True):
"""
 Return module or None. Absolute import is required.

 :param (str) name: Dot-separated module path. E.g., 'scipy.stats'.
 :raise: (ImportError) Only when exc_msg is defined.
 :return: (module|None) If import succeeds, the module will be returned.

 """
ifnotshould_load:
returnsys.modules.get(name, None)

ifnamenotin_not_importable:
try:
returnimport_module(name)
exceptImportError:
_not_importable.add(name)
exceptException:
_not_importable.add(name)
msg=f"Error importing optional module {name}"
logger.exception(msg)

returnNone