How to use the markupsafe._compat.string_types function in MarkupSafe

def _escape_argspec(obj, iterable, escape):
    """Helper for various string-wrapped functions."""
    for key, value in iterable:
        if hasattr(value, '__html__') or isinstance(value, string_types):
            obj[key] = escape(value)
    return obj

def _escape_argspec(obj, iterable, escape):
    """Helper for various string-wrapped functions."""
    for key, value in iterable:
        if hasattr(value, '__html__') or isinstance(value, string_types):
            obj[key] = escape(value)
    return obj

def _escape_argspec(obj, iterable, escape):
    """Helper for various string-wrapped functions."""
    for key, value in iterable:
        if hasattr(value, '__html__') or isinstance(value, string_types):
            obj[key] = escape(value)
    return obj

def _escape_argspec(obj, iterable, escape):
    """Helper for various string-wrapped functions."""
    for key, value in iterable:
        if hasattr(value, '__html__') or isinstance(value, string_types):
            obj[key] = escape(value)
    return obj

def __radd__(self, other):
        if hasattr(other, '__html__') or isinstance(other, string_types):
            return self.escape(other).__add__(self)
        return NotImplemented

def _escape_argspec(obj, iterable, escape):
    """Helper for various string-wrapped functions."""
    for key, value in iterable:
        if hasattr(value, '__html__') or isinstance(value, string_types):
            obj[key] = escape(value)
    return obj

def _escape_argspec(obj, iterable, escape):
    """Helper for various string-wrapped functions."""
    for key, value in iterable:
        if hasattr(value, '__html__') or isinstance(value, string_types):
            obj[key] = escape(value)
    return obj