Claude API 实战：Anthropic 模型完全指南

pip install anthropic

import os
os.environ["ANTHROPIC_API_KEY"] = "sk-ant-..."

import anthropic

client = anthropic.Anthropic()

message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "你好"}
    ]
)

print(message.content[0].text)

message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "什么是 AI？"},
        {"role": "assistant", "content": "AI 是人工智能..."},
        {"role": "user", "content": "它能做什么？"}
    ]
)

message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    system="你是一个专业的技术作家",
    messages=[
        {"role": "user", "content": "写一篇博客"}
    ]
)

with client.messages.stream(
    model="claude-sonnet-4-20250514",
    messages=[{"role": "user", "content": "写一个故事"}]
) as stream:
    for text in stream.text_stream:
        print(text, end="")

client = anthropic.Anthropic(
    default_headers={"anthropic-beta": "tools-2024-01-15"}
)

message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[{"role": "user", "content": "北京天气"}],
    tools=[{
        "name": "get_weather",
        "description": "获取天气",
        "input_schema": {
            "type": "object",
            "properties": {
                "location": {"type": "string"}
            }
        }
    }]
)