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8180637345
- Add tests for Playwright tools schema serialization - Introduce base empty args Input class for BaseBrowserTool Test Plan: `poetry run pytest tests/unit_tests/tools/playwright/test_all.py` Fixes #26758 --------- Co-authored-by: Erick Friis <erick@langchain.dev> Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>
61 lines
2.0 KiB
Python
61 lines
2.0 KiB
Python
from __future__ import annotations
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from typing import Optional, Type
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from langchain_core.callbacks import (
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AsyncCallbackManagerForToolRun,
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CallbackManagerForToolRun,
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)
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from pydantic import BaseModel
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from langchain_community.tools.playwright.base import BaseBrowserTool
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from langchain_community.tools.playwright.utils import (
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aget_current_page,
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get_current_page,
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)
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class NavigateBackToolInput(BaseModel):
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"""Explicit no-args input for NavigateBackTool."""
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class NavigateBackTool(BaseBrowserTool): # type: ignore[override, override]
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"""Navigate back to the previous page in the browser history."""
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name: str = "previous_webpage"
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description: str = "Navigate back to the previous page in the browser history"
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args_schema: Type[BaseModel] = NavigateBackToolInput
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def _run(self, run_manager: Optional[CallbackManagerForToolRun] = None) -> str:
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"""Use the tool."""
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if self.sync_browser is None:
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raise ValueError(f"Synchronous browser not provided to {self.name}")
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page = get_current_page(self.sync_browser)
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response = page.go_back()
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if response:
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return (
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f"Navigated back to the previous page with URL '{response.url}'."
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f" Status code {response.status}"
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)
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else:
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return "Unable to navigate back; no previous page in the history"
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async def _arun(
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self,
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run_manager: Optional[AsyncCallbackManagerForToolRun] = None,
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) -> str:
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"""Use the tool."""
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if self.async_browser is None:
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raise ValueError(f"Asynchronous browser not provided to {self.name}")
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page = await aget_current_page(self.async_browser)
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response = await page.go_back()
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if response:
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return (
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f"Navigated back to the previous page with URL '{response.url}'."
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f" Status code {response.status}"
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)
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else:
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return "Unable to navigate back; no previous page in the history"
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