Improve langchain examples

[nicolewhite]

Making these examples slightly more verbose / complicated so they can better demonstrate AB

[vercel]

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Name	Status	Preview	Updated (UTC)
autoblocks-examples	✅ Ready (Inspect)	Visit Preview	Oct 23, 2023 8:11pm

[review-agent-prime]

The code changes in the PR look good overall. However, there are a few areas where improvements can be made:

1. In both JavaScript and Python files, error handling is missing. It's a good practice to add error handling to catch and handle any potential errors that might occur during the execution of the code. This can be done using try-catch in JavaScript and try-except in Python.

2. In the JavaScript file, the main function is an async function but it's being called without a catch block. This can lead to unhandled promise rejections. It's recommended to handle this properly.

Here are the suggested changes:

JavaScript:

const main = async () => {
  try {
    // existing code...
  } catch (error) {
    console.error('An error occurred:', error);
  }
};

main().catch(error => {
  console.error('An error occurred when calling main:', error);
});

Python:

if __name__ == "__main__":
    try:
        # existing code...
    except Exception as e:
        print(f"An error occurred: {e}")

3. In the Python file, the dotenv.load_dotenv("../../.env") line assumes that the script will always be run from a specific location. It would be better to determine the path to the .env file based on the location of the script itself.

Here is the suggested change:

import os

dotenv.load_dotenv(os.path.join(os.path.dirname(__file__), '../../.env'))

4. In both JavaScript and Python files, the temperature parameter for OpenAI is hardcoded. It would be better to make this a configurable parameter.

Here is the suggested change:

JavaScript:

const temperature = process.env.TEMPERATURE || 0.7;
const synopsisLLM = new OpenAI({ temperature });

Python:

temperature = float(os.getenv('TEMPERATURE', 0.7))
synopsis_llm = OpenAI(temperature=temperature)

Remember to add TEMPERATURE to your .env file.