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langchain/tests/unit_tests/llms/fake_llm.py

22 lines
667 B
Python

"""Fake LLM wrapper for testing purposes."""
from typing import List, Mapping, Optional
from langchain.llms.base import LLM
class FakeLLM(LLM):
"""Fake LLM wrapper for testing purposes."""
def __init__(self, queries: Optional[Mapping] = None):
"""Initialize with optional lookup of queries."""
self._queries = queries
def __call__(self, prompt: str, stop: Optional[List[str]] = None) -> str:
"""First try to lookup in queries, else return 'foo' or 'bar'."""
if self._queries is not None:
return self._queries[prompt]
if stop is None:
return "foo"
else:
return "bar"