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"""
Show how to use custom outputs.
@dev You need to add OPENAI_API_KEY to your environment variables.
"""
import os
import sys
from browser_use.agent.views import AgentState
from browser_use.browser.browser import Browser, BrowserConfig
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import asyncio
from dotenv import load_dotenv
from langchain_openai import ChatOpenAI
from browser_use import Agent
load_dotenv()
async def main():
task = 'Go to hackernews show hn and give me the first 5 posts'
browser = Browser(
config=BrowserConfig(
headless=True,
)
)
browser_context = await browser.new_context()
agent_state = AgentState()
for i in range(10):
agent = Agent(
task=task,
llm=ChatOpenAI(model='gpt-4o'),
browser=browser,
browser_context=browser_context,
injected_agent_state=agent_state,
page_extraction_llm=ChatOpenAI(model='gpt-4o-mini'),
)
done, valid = await agent.take_step()
print(f'Step {i}: Done: {done}, Valid: {valid}')
if done and valid:
break
agent_state.history.history = []
# Save state to file
with open('agent_state.json', 'w') as f:
serialized = agent_state.model_dump_json(exclude={'history'})
f.write(serialized)
# Load state back from file
with open('agent_state.json', 'r') as f:
loaded_json = f.read()
agent_state = AgentState.model_validate_json(loaded_json)
break
if __name__ == '__main__':
asyncio.run(main())
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