Python rest_framework.authentication 模块，SessionAuthentication() 实例源码

def get_settings():
    """Due to app loading issues during startup provide a function to return
    settings only when needed."""

    # Import late because apps may not be loaded yet
    from rest_framework.authentication import SessionAuthentication, BasicAuthentication

    return getattr(settings, "REST_FRAMEWORK_EXTRAS", {
        "blacklist": {
            "sessions-session": {},
            "admin-logentry": {},
        },
        "authentication-classes": (SessionAuthentication, BasicAuthentication),
        "permission-classes": (DjangoModelPermissions,)
    })