Update app.py

app.py

@@ -53,17 +53,7 @@ os.makedirs("/tmp/deepeval_results", exist_ok=True)
 import tempfile
 tempfile.tempdir = "/tmp"
 # 在此處加入 DeepEval 的 monkey-patch，避免全域更改工作目錄
-original_evaluate = deepeval.evaluate
 
-def patched_evaluate(*args, **kwargs):
-    current_dir = os.getcwd()
-    try:
-        os.chdir("/tmp")
-        return original_evaluate(*args, **kwargs)
-    finally:
-        os.chdir(current_dir)
-
-deepeval.evaluate = patched_evaluate
 
 
 SHOW_EVAL = os.getenv("SHOW_EVAL", "false").lower() == "true"
@@ -98,10 +88,22 @@ from geopy.geocoders import Nominatim
 from timezonefinder import TimezoneFinder
 from langchain_experimental.agents import create_pandas_dataframe_agent
 from langsmith import traceable
-from deepeval import evaluate
-from deepeval.metrics import AnswerRelevancyMetric
-from deepeval.test_case import LLMTestCase
+#from deepeval import evaluate
+#from deepeval.metrics import AnswerRelevancyMetric
+#from deepeval.test_case import LLMTestCase
 # from langgraph.graph import Graph
+try:
+    from deepeval import evaluate
+    from deepeval.metrics import AnswerRelevancyMetric
+    from deepeval.test_case import LLMTestCase
+    DEEPEVAL_AVAILABLE = True
+except:
+    DEEPEVAL_AVAILABLE = False
+    def evaluate(*args, **kwargs): return []
+    class AnswerRelevancyMetric:
+        def __init__(self, *args, **kwargs): pass
+    class LLMTestCase:
+        def __init__(self, *args, **kwargs): pass
 from langgraph.graph import StateGraph
 from langchain_core.runnables import RunnableLambda
 from langchain.chains import LLMChain