'Read old defaults'

def _load_old_defaults(self, old_version):

    old_defaults = cp.ConfigParser()
    if check_version(old_version, '3.0.0', '<='):
        path = get_module_source_path('spyder')
    else:
        path = osp.dirname(self.filename())
    path = osp.join(path, 'defaults')
    old_defaults.read(osp.join(path, (('defaults-' + old_version) + '.ini')))
    return old_defaults
