mirror of
https://github.com/hwchase17/langchain.git
synced 2025-06-02 04:58:46 +00:00
8f38b7a725
## Summary I ran `ruff check --extend-select RUF100 -n` to identify `# noqa` comments that weren't having any effect in Ruff, and then `ruff check --extend-select RUF100 -n --fix` on select files to remove all of the unnecessary `# noqa: F401` violations. It's possible that these were needed at some point in the past, but they're not necessary in Ruff v0.1.15 (used by LangChain) or in the latest release. Co-authored-by: Erick Friis <erick@langchain.dev>
62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
from __future__ import annotations
|
|
|
|
from typing import TYPE_CHECKING, Optional, Tuple, Type
|
|
|
|
from langchain_core.pydantic_v1 import root_validator
|
|
from langchain_core.tools import BaseTool
|
|
|
|
if TYPE_CHECKING:
|
|
from playwright.async_api import Browser as AsyncBrowser
|
|
from playwright.sync_api import Browser as SyncBrowser
|
|
else:
|
|
try:
|
|
# We do this so pydantic can resolve the types when instantiating
|
|
from playwright.async_api import Browser as AsyncBrowser
|
|
from playwright.sync_api import Browser as SyncBrowser
|
|
except ImportError:
|
|
pass
|
|
|
|
|
|
def lazy_import_playwright_browsers() -> Tuple[Type[AsyncBrowser], Type[SyncBrowser]]:
|
|
"""
|
|
Lazy import playwright browsers.
|
|
|
|
Returns:
|
|
Tuple[Type[AsyncBrowser], Type[SyncBrowser]]:
|
|
AsyncBrowser and SyncBrowser classes.
|
|
"""
|
|
try:
|
|
from playwright.async_api import Browser as AsyncBrowser
|
|
from playwright.sync_api import Browser as SyncBrowser
|
|
except ImportError:
|
|
raise ImportError(
|
|
"The 'playwright' package is required to use the playwright tools."
|
|
" Please install it with 'pip install playwright'."
|
|
)
|
|
return AsyncBrowser, SyncBrowser
|
|
|
|
|
|
class BaseBrowserTool(BaseTool):
|
|
"""Base class for browser tools."""
|
|
|
|
sync_browser: Optional["SyncBrowser"] = None
|
|
async_browser: Optional["AsyncBrowser"] = None
|
|
|
|
@root_validator
|
|
def validate_browser_provided(cls, values: dict) -> dict:
|
|
"""Check that the arguments are valid."""
|
|
lazy_import_playwright_browsers()
|
|
if values.get("async_browser") is None and values.get("sync_browser") is None:
|
|
raise ValueError("Either async_browser or sync_browser must be specified.")
|
|
return values
|
|
|
|
@classmethod
|
|
def from_browser(
|
|
cls,
|
|
sync_browser: Optional[SyncBrowser] = None,
|
|
async_browser: Optional[AsyncBrowser] = None,
|
|
) -> BaseBrowserTool:
|
|
"""Instantiate the tool."""
|
|
lazy_import_playwright_browsers()
|
|
return cls(sync_browser=sync_browser, async_browser=async_browser)
|