OpenAI Function Calling

A minimal Python demo showing OpenAI function/tool calling with exactly two tools:

• c_to_f — convert Celsius to Fahrenheit
• f_to_c — convert Fahrenheit to Celsius

Quick start

1. Python 3.10+
2. cp .env.example .env and put your key in OPENAI_API_KEY=...
3. Install:

   pip install -r requirements.txt

4. python -m tool_calling.chat

What you’ll learn

• How to define tool schema (name + JSON params)

• Letting the model choose which tool to call

• Executing the Python tool and feeding results back to the model

Try these prompts

• convert 100F to C

• what is 37 celsius in fahrenheit?

• can you convert -10 C to F?

• i have 212 f — what's that in c?