[HANDS-ON BUG] UNIT1 code cant run

**Describe the bug** https://huggingface.co/learn/agents-course/en/unit1/dummy-agent-library in this section last code clip like this messages=[ {"role": "system", "content": SYSTEM_PROMPT}, {"role": "user", "content": "What's the weather in London ?"}, {"role": "assistant", "content": output.choices[0].message.content + "Observation:\n" + get_weather('London')}, ] output = client.chat.completions.create( messages=messages, stream=False, max_tokens=200, ) print(output.choices[0].message.content) messages depends output, output depends messages, A circular dependency was formed.