Fixed DeprecationWarning for PromptTemplate.from_file module-leve…

…l calls (langchain-ai#14468)

Resolves langchain-ai#14467

libs/langchain/langchain/chains/llm_summarization_checker/base.py

@@ -17,18 +17,10 @@
 
 PROMPTS_DIR = Path(__file__).parent / "prompts"
 
-CREATE_ASSERTIONS_PROMPT = PromptTemplate.from_file(
- PROMPTS_DIR / "create_facts.txt", ["summary"]
-)
-CHECK_ASSERTIONS_PROMPT = PromptTemplate.from_file(
- PROMPTS_DIR / "check_facts.txt", ["assertions"]
-)
-REVISED_SUMMARY_PROMPT = PromptTemplate.from_file(
- PROMPTS_DIR / "revise_summary.txt", ["checked_assertions", "summary"]
-)
-ARE_ALL_TRUE_PROMPT = PromptTemplate.from_file(
- PROMPTS_DIR / "are_all_true_prompt.txt", ["checked_assertions"]
-)
+CREATE_ASSERTIONS_PROMPT = PromptTemplate.from_file(PROMPTS_DIR / "create_facts.txt")
+CHECK_ASSERTIONS_PROMPT = PromptTemplate.from_file(PROMPTS_DIR / "check_facts.txt")
+REVISED_SUMMARY_PROMPT = PromptTemplate.from_file(PROMPTS_DIR / "revise_summary.txt")
+ARE_ALL_TRUE_PROMPT = PromptTemplate.from_file(PROMPTS_DIR / "are_all_true_prompt.txt")
 
 
 def _load_sequential_chain(

libs/langchain/tests/unit_tests/chains/test_llm_summarization_checker.py

@@ -14,6 +14,13 @@
 from tests.unit_tests.llms.fake_llm import FakeLLM
 
 
+def test_input_variables() -> None:
+ assert CREATE_ASSERTIONS_PROMPT.input_variables == ["summary"]
+ assert CHECK_ASSERTIONS_PROMPT.input_variables == ["assertions"]
+ assert REVISED_SUMMARY_PROMPT.input_variables == ["checked_assertions", "summary"]
+ assert ARE_ALL_TRUE_PROMPT.input_variables == ["checked_assertions"]
+
+
 @pytest.fixture
 def fake_llm_summarization_checker_chain() -> LLMSummarizationCheckerChain:
  """Fake LLMCheckerChain for testing."""