Function _load_testfile

Lib/doctest.py:240–255

(filename, package, module_relative, encoding)

        raise TypeError("Expected a module, string, or None")

def _load_testfile(filename, package, module_relative, encoding):
    if module_relative:
        package = _normalize_module(package, 3)
        filename = _module_relative_path(package, filename)
        if (loader := getattr(package, '__loader__', None)) is None:
            try:
                loader = package.__spec__.loader
            except AttributeError:
                pass
        if hasattr(loader, 'get_data'):
            file_contents = loader.get_data(filename)
            # get_data() opens files as 'rb', so one must do the equivalent
            # conversion as universal newlines would do.
            return TextIOWrapper(BytesIO(file_contents), encoding=encoding, newline=None).read(), filename
    with open(filename, encoding=encoding) as f:
        return f.read(), filename

def _indent(s, indent=4):
    """