module 'playwright.async_api' has no attribute 'AsyncBrowser'

[mehrdad-shokri]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

from langchain_community.agent_toolkits import PlayWrightBrowserToolkit
from langchain_community.tools.playwright.utils import create_async_playwright_browser

PlayWrightBrowserToolkit.from_browser(
        async_browser=create_async_playwright_browser(headless=True, args=["--disable-dev-shm-usage"])).get_tools()

Error Message and Stack Trace (if applicable)

"module 'playwright.async_api' has no attribute 'AsyncBrowser'"

Description

After 1 hour of investigation here is my findings:

• The issue is introduced by this commit
• As you can see from playwright-python source code, there is no AsyncBrowser or SyncBrowser exports. They were correctly imported Browser as AsyncBrowser Browser as SyncBrowser in the past but this PR broke it.
• As a side note to the mentioned PR, the lazy_import_playwright_browsers uses guard_import for both of the browsers(although the name of the class called from the module is incorrect), but still guard_import is called inside validate_browser_provided and from_browser again. These 2 functions can just call lazy_import_playwright_browsers instead of repeating your self 6 times. Just call lazy_import_playwright_browsers inside the mentions methods.
• The lazy_import_playwright_browsers body should look like:

def lazy_import_playwright_browsers() -> Tuple[Type[AsyncBrowser], Type[SyncBrowser]]:
    """
    Lazy import playwright browsers.

    Returns:
        Tuple[Type[AsyncBrowser], Type[SyncBrowser]]:
            AsyncBrowser and SyncBrowser classes.
    """
    return (
        guard_import(module_name="playwright.async_api").Browser,
        guard_import(module_name="playwright.sync_api").Browser,
    )

• Side note on libs/community/langchain_community/tools/gmail/utils.py changes introduced by the commit:
  All the import functions import_googleapiclient_resource_builder, import_google, import_installed_app_flow were changed to use guard_import but later in the body of the functions get_gmail_credentials build_resource_service instead of using these functions, guard_import were called again(instead of just calling the import functions directly) to import classes from google libraries. this is obviously a code smell.

I can submit a PR for this

System Info

langchain==0.1.17
langchain-community==0.0.37
langchain-core==0.1.52
langchain-experimental==0.0.57
langchain-openai==0.1.6
langchain-text-splitters==0.0.1
langchainhub==0.1.15

System Information
------------------
> OS:  Darwin
> OS Version:  Darwin Kernel Version 23.4.0: Fri Mar 15 00:12:41 PDT 2024; root:xnu-10063.101.17~1/RELEASE_ARM64_T8103
> Python Version:  3.10.12 (main, May  4 2024, 19:28:08) [Clang 15.0.0 (clang-1500.3.9.4)]

Package Information
-------------------
> langchain_core: 0.1.52
> langchain: 0.1.17
> langchain_community: 0.0.37
> langsmith: 0.1.54
> langchain_experimental: 0.0.57
> langchain_openai: 0.1.6
> langchain_text_splitters: 0.0.1
> langchainhub: 0.1.15

Packages not installed (Not Necessarily a Problem)
--------------------------------------------------
The following packages were not found:

> langgraph
> langserve