demo.py

from langchain import PromptTemplate, HuggingFaceHub, LLMChain


# initialize HF LLM
flan_t5 = HuggingFaceHub(
    repo_id="google/flan-t5-xl",
    model_kwargs={"temperature":1e-10},
    huggingfacehub_api_token="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"
)

# build prompt template for simple question-answering
template = """Question: {question}

Answer: """
prompt = PromptTemplate(template=template, input_variables=["question"])

llm_chain = LLMChain(
    prompt=prompt,
    llm=flan_t5
)

question = "Which NFL team won the Super Bowl in the 2010 season?"

print(llm_chain.run(question))