Create util.py

Simple chaining utility used to chain two templates together.

util.py

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+from langchain import OpenAI, LLMChain, PromptTemplate
+from langchain.chains import SimpleSequentialChain
+
+
+# Function to generate title and Logline from simple chaining
+def generate_script(prompt, creativity, api_key):
+    # Setting up OpenAI LLM
+    llm = OpenAI(temperature=creativity, openai_api_key=api_key,
+                 model_name='gpt-3.5-turbo')
+
+    first_template = 'What is a good name for a story about {description}?'
+    first_prompt = PromptTemplate.from_template(first_template)
+    first_chain = LLMChain(llm=llm, prompt=first_prompt)
+    title = first_chain.run(prompt)
+
+    second_template = 'Write a logline for the following story: {story_name}'
+    second_prompt = PromptTemplate.from_template(second_template)
+    second_chain = LLMChain(llm=llm, prompt=second_prompt)
+
+    simple_chain = SimpleSequentialChain(chains=[first_chain, second_chain], verbose=True)
+
+    logline = simple_chain.run(prompt)
+
+    return title, logline