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"""Subset of importlib.abc used to reduce importlib.util imports."""
from . import _bootstrap
import abc
import warnings
class Loader(metaclass=abc.ABCMeta):
"""Abstract base class for import loaders."""
def create_module(self, spec):
"""Return a module to initialize and into which to load.
This method should raise ImportError if anything prevents it
from creating a new module. It may return None to indicate
that the spec should create the new module.
"""
# By default, defer to default semantics for the new module.
return None
# We don't define exec_module() here since that would break
# hasattr checks we do to support backward compatibility.
def load_module(self, fullname):
"""Return the loaded module.
The module must be added to sys.modules and have import-related
attributes set properly. The fullname is a str.
ImportError is raised on failure.
This method is deprecated in favor of loader.exec_module(). If
exec_module() exists then it is used to provide a backwards-compatible
functionality for this method.
"""
if not hasattr(self, 'exec_module'):
raise ImportError
# Warning implemented in _load_module_shim().
return _bootstrap._load_module_shim(self, fullname)
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