def typestring(obj):
    """Make a string for the object's type

    Parameters
    ----------
    obj : obj
        Python object.

    Returns
    -------
    `str`
        String representation of the object's type. This is the type's
        importable namespace.

    Examples
    --------
    >>> import docutils.nodes
    >>> para = docutils.nodes.paragraph()
    >>> typestring(para)
    'docutils.nodes.paragraph'
    """
    obj_type = type(obj)
    return '.'.join((obj_type.__module__, obj_type.__name__))
