sys_info.py — langchain Source File

Source Code

"""Print information about the system and langchain packages for debugging purposes."""

import pkgutil
import platform
import re
import sys
from collections.abc import Sequence
from importlib import metadata, util


def _get_sub_deps(packages: Sequence[str]) -> list[str]:
    """Get any specified sub-dependencies."""
    sub_deps = set()
    underscored_packages = {pkg.replace("-", "_") for pkg in packages}

    for pkg in packages:
        try:
            required = metadata.requires(pkg)
        except metadata.PackageNotFoundError:
            continue

        if not required:
            continue

        for req in required:
            # Extract package name (e.g., "httpx<1,>=0.23.0" -> "httpx")
            match = re.match(r"^([a-zA-Z0-9_.-]+)", req)
            if match:
                pkg_name = match.group(1)
                if pkg_name.replace("-", "_") not in underscored_packages:
                    sub_deps.add(pkg_name)

    return sorted(sub_deps, key=lambda x: x.lower())


def print_sys_info(*, additional_pkgs: Sequence[str] = ()) -> None:
    """Print information about the environment for debugging purposes.

    Args:
        additional_pkgs: Additional packages to include in the output.
    """
    # Packages that do not start with "langchain" prefix.
    other_langchain_packages = [
        "langserve",
        "langsmith",
    ]

    langchain_pkgs = [
        name for _, name, _ in pkgutil.iter_modules() if name.startswith("langchain")
    ]

    langgraph_pkgs = [
        name for _, name, _ in pkgutil.iter_modules() if name.startswith("langgraph")
    ]

    all_packages = sorted(
        set(
            langchain_pkgs
            + langgraph_pkgs
            + other_langchain_packages
// ... (77 more lines)