from importlib import machinery
import sys
import types

class Module(types.ModuleType):
    pass

class LazyModule(Module):
    def __getattribute__(self, attr):
        raise RuntimeError("don't touch me!")

class LazyImporter:
    def find_spec(self, name, path=None, target=None):
        if name != 'lazybits':
            return None
        return machinery.ModuleSpec(name, self)

    @staticmethod
    def create_module(spec):
        return Module(spec.name)

    @staticmethod
    def exec_module(module):
        module.__class__ = LazyModule

sys.meta_path.append(LazyImporter())
import lazybits
# Should not trigger the RuntimeError until after this point.
try:
    print(lazybits.__name__)
except RuntimeError:
    print('RuntimeError raised where expected')