def read_text(
    package: Package,
    resource: Resource,
    encoding: str = 'utf-8',
    errors: str = 'strict',
) -> str:
    """Return the decoded string of the resource.

    The decoding-related arguments have the same semantics as those of
    bytes.decode().
    """
    with open_text(package, resource, encoding, errors) as fp:
        return fp.read()

def open_text(
    package: Package,
    resource: Resource,
    encoding: str = 'utf-8',
    errors: str = 'strict',
) -> TextIO:
    """Return a file-like object opened for text reading of the resource."""
    return (_common.files(package) / _common.normalize_path(resource)).open(
        'r', encoding=encoding, errors=errors
    )

def files(package):
    # type: (Package) -> Traversable
    """
    Get a Traversable resource from a package
    """
    return from_package(get_package(package))


def normalize_path(path):
    # type: (Any) -> str
    """Normalize a path by ensuring it is a string.

    If the resulting string contains path separators, an exception is raised.
    """
    str_path = str(path)
    parent, file_name = os.path.split(str_path)
    if parent:
        raise ValueError(f'{path!r} must be only a file name')
    return file_name


def get_resource_reader(package):
    # type: (types.ModuleType) -> Optional[ResourceReader]
    """
    Return the package's loader if it's a ResourceReader.
    """
    # We can't use
    # a issubclass() check here because apparently abc.'s __subclasscheck__()
    # hook wants to create a weak reference to the object, but
    # zipimport.zipimporter does not support weak references, resulting in a
    # TypeError.  That seems terrible.
    spec = package.__spec__
    reader = getattr(spec.loader, 'get_resource_reader', None)  # type: ignore
    if reader is None:
        return None
    return reader(spec.name)  # type: ignore


def resolve(cand):
    # type: (Package) -> types.ModuleType
    return cand if isinstance(cand, types.ModuleType) else importlib.import_module(cand)


def get_package(package):
    # type: (Package) -> types.ModuleType
    """Take a package name or module object and return the module.

    Raise an exception if the resolved module is not a package.
    """
    resolved = resolve(package)
    if wrap_spec(resolved).submodule_search_locations is None:
        raise TypeError(f'{package!r} is not a package')
    return resolved


def from_package(package):
    """
    Return a Traversable object for the given package.

    """
    spec = wrap_spec(package)
    reader = spec.loader.get_resource_reader(spec.name)
    return reader.files()