app.py

from langchain_openai import OpenAI 
from langchain.prompts import PromptTemplate 
from langchain.chains import LLMChain 
from langchain.chains import SimpleSequentialChain 
from langchain.chains import SequentialChain 
from secret_key import openapi_key

import os 
os.environ['OPENAI_API_KEY'] = openapi_key 

llm = OpenAI(temperature=0.6)

prompt_template_name = PromptTemplate(
    input_variables = ['cuisine'],
    template = "I want to open a restaurant for {cuisine} food. Suggest a fancy name for this."
)

name_chain = LLMChain(llm=llm, prompt=prompt_template_name, output_key="restaurant_name")

prompt_template_items = PromptTemplate(
    input_variables = ['restaurant_name'],
    template = "Suggest some menu items for {restaurant_name}. Return it as a comma separated list. "
)

food_items_chain = LLMChain(llm=llm, prompt=prompt_template_items, output_key="menu_items")

chain = SequentialChain(
    chains = [name_chain, food_items_chain],
    input_variables = ['cuisine'],
    output_variables = ['restaurant_name', 'menu_items']
)

response = chain.invoke("American")
print(response)
# {'cuisine': 'American', 'restaurant_name': '\n\n"Stateside Eats" ', 'menu_items': '\n\n1. New York-style pizza\n2. California burger\n3. Texas BBQ ribs\n4. Louisiana-style gumbo\n5. Chicago-style deep dish pizza\n6. Maine lobster roll\n7. Florida key lime pie\n8. Georgia peach cobbler\n9. Kentucky fried chicken\n10. Arizona chimichangas\n11. Tennessee hot chicken sandwich\n12. Hawaii poke bowl\n13. Wisconsin cheese curds\n14. Virginia ham biscuits\n15. Colorado green chili.'}