Relax langchain constraints

langchain_benchmarks/rag/evaluators.py

@@ -3,7 +3,11 @@
 from langchain.chat_models import ChatOpenAI
 from langchain.evaluation import load_evaluator
 from langchain.smith import RunEvalConfig
-from langchain_core.language_models import BaseLanguageModel
+
+try:
+    from langchain.schema.language_model import BaseLanguageModel
+except ImportError:
+    from langchain_core.language_models import BaseLanguageModel
 from langsmith.evaluation.evaluator import EvaluationResult, RunEvaluator
 from langsmith.schemas import Example, Run
 

pyproject.toml

@@ -8,8 +8,7 @@ readme = "README.md"
 
 [tool.poetry.dependencies]
 python = "^3.8.1"
-langchain = ">=0.0.333"
-langchain_core = ">=0.0.3"
+langchain = ">=0.0.300"
 langsmith = ">=0.0.66"
 tqdm = "^4"
 ipywidgets = "^8"