REST_FRAMEWORK = {

    'DEFAULT_RENDERER_CLASSES':['rest_framework.renderers.JSONRenderer','rest_framework.renderers.BrowsableAPIRenderer',],

    'DEFAULT_VERSIONING_CLASS':'rest_framework.versioning.URLPathVersioning',

    'ALLOWED_VERSIONS':['v1','v2'], # 允许的版本

    'VERSION_PARAM':'version', # 参数

    'DEFAULT_VERSION':'v1', # 默认版本

}

    url(r'^api/(?P<version>\w+)/'),