Anatomy of a message

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Task

📝 **Predict** what Python prints:

```python
messages = [
    {"role": "user", "content": "Hi"},
    {"role": "assistant", "content": "Hello!"},
    {"role": "user", "content": "Tell me a joke"},
]
print(len(messages), messages[-1]["role"])
```

Type the output (one line).

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🤖quiz

System prompts that control behavior

🤖predict

Multi-turn conversations

🤖quiz

Streaming responses

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Prerequisites — what you should know before this track

📊quizFREE

Why pandas?

🔮 Predict the output

Read the code carefully

messages = [
    {"role": "user", "content": "Hi"},
    {"role": "assistant", "content": "Hello!"},
    {"role": "user", "content": "Tell me a joke"},
]
print(len(messages), messages[-1]["role"])

What will the program print? Write here:

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💬 Discussion