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35 lines
967 B
Python
35 lines
967 B
Python
from typing import Dict, List
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from pydantic import BaseModel
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from langchain.chains.base import Chain
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from langchain.chains.pipeline import Pipeline
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class FakeChain(Chain, BaseModel):
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input_variables: List[str]
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output_variables: List[str]
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@property
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def input_keys(self) -> List[str]:
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return self.input_variables
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@property
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def output_keys(self) -> List[str]:
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return self.output_variables
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def _call(self, inputs: Dict[str, str]) -> Dict[str, str]:
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outputs = {}
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for var in self.output_variables:
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outputs[var] = " ".join(self.input_variables) + "foo"
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return outputs
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def test_pipeline_usage() -> None:
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chain_1 = FakeChain(input_variables=["foo"], output_variables=["bar"])
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chain_2 = FakeChain(input_variables=["bar"], output_variables=["baz"])
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pipeline = Pipeline(chains=[chain_1, chain_2], input_variables=["foo"])
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output = pipeline({"foo": "123"})
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breakpoint()
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