ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

chapter9/browser-use-rpa/browser-use/examples/models/langchain/example.py

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+"""
+Example of using LangChain models with browser-use.
+
+This example demonstrates how to:
+1. Wrap a LangChain model with ChatLangchain
+2. Use it with a browser-use Agent
+3. Run a simple web automation task
+
+@file purpose: Example usage of LangChain integration with browser-use
+"""
+
+import asyncio
+
+from langchain_openai import ChatOpenAI  # pyright: ignore
+
+from browser_use import Agent
+from examples.models.langchain.chat import ChatLangchain
+
+
+async def main():
+	"""Basic example using ChatLangchain with OpenAI through LangChain."""
+
+	# Create a LangChain model (OpenAI)
+	langchain_model = ChatOpenAI(
+		model='gpt-4.1-mini',
+		temperature=0.1,
+	)
+
+	# Wrap it with ChatLangchain to make it compatible with browser-use
+	llm = ChatLangchain(chat=langchain_model)
+
+	# Create a simple task
+	task = "Go to google.com and search for 'browser automation with Python'"
+
+	# Create and run the agent
+	agent = Agent(
+		task=task,
+		llm=llm,
+	)
+
+	print(f'🚀 Starting task: {task}')
+	print(f'🤖 Using model: {llm.name} (provider: {llm.provider})')
+
+	# Run the agent
+	history = await agent.run()
+
+	print(f'✅ Task completed! Steps taken: {len(history.history)}')
+
+	# Print the final result if available
+	if history.final_result():
+		print(f'📋 Final result: {history.final_result()}')
+
+		return history
+
+
+if __name__ == '__main__':
+	print('🌐 Browser-use LangChain Integration Example')
+	print('=' * 45)
+
+	asyncio.run(main())