Skip guardrail test for python<=3.8

Author: qiuosier

tests/unitary/with_extras/langchain/test_guardrails.py

@@ -10,6 +10,12 @@
 import sys
 from typing import Any, List, Dict, Mapping, Optional
 from unittest import TestCase
+import pytest
+
+pytestmark = pytest.mark.skipif(
+    sys.version_info < (3, 9), reason="Requires Python 3.9 or higher"
+)
+
 from langchain.callbacks.manager import CallbackManagerForLLMRun
 from langchain.llms.base import LLM
 from langchain.prompts import PromptTemplate
@@ -18,9 +24,6 @@
 from ads.llm.guardrails.base import BlockedByGuardrail, GuardrailIO
 from ads.llm.chain import GuardrailSequence
 from ads.llm.serialize import load, dump
-import pytest
-
-pytestmark = pytest.mark.skipif(sys.version_info < (3, 9), reason="Requires Python 3.9 or higher")
 
 
 class FakeLLM(LLM):