print_sys_info() — langchain Function Reference

Architecture documentation for the print_sys_info() function in sys_info.py from the langchain codebase.

Function python CoreAbstractions RunnableInterface calls 1

Entity Profile

CoreAbstractions→ RunnableInterface→ print_sys_info() — langchain Function Reference

Dependency Diagram

graph TD
  cdf45fc0_01da_db4a_bf5c_59e28cef0148["print_sys_info()"]
  2bcdd6e0_75d4_11ae_f64b_12df138edcea["sys_info.py"]
  cdf45fc0_01da_db4a_bf5c_59e28cef0148 -->|defined in| 2bcdd6e0_75d4_11ae_f64b_12df138edcea
  6135f8da_3d4d_2105_1559_21f716adf8b7["_get_sub_deps()"]
  cdf45fc0_01da_db4a_bf5c_59e28cef0148 -->|calls| 6135f8da_3d4d_2105_1559_21f716adf8b7
  style cdf45fc0_01da_db4a_bf5c_59e28cef0148 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/sys_info.py lines 36–132

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
            + list(additional_pkgs)
        )
    )

    # Always surface these packages to the top
    order_by = ["langchain_core", "langchain", "langchain_community", "langsmith"]

    for pkg in reversed(order_by):
        if pkg in all_packages:
            all_packages.remove(pkg)
            all_packages = [pkg, *list(all_packages)]

    system_info = {
        "OS": platform.system(),
        "OS Version": platform.version(),
        "Python Version": sys.version,
    }
    print()
    print("System Information")
    print("------------------")
    print("> OS: ", system_info["OS"])
    print("> OS Version: ", system_info["OS Version"])
    print("> Python Version: ", system_info["Python Version"])

    # Print out only langchain packages
    print()
    print("Package Information")
    print("-------------------")

    not_installed = []

    for pkg in all_packages:
        try:
            found_package = util.find_spec(pkg)
        except Exception:
            found_package = None
        if found_package is None:
            not_installed.append(pkg)
            continue

        # Package version
        try:
            package_version = metadata.version(pkg)
        except Exception:
            package_version = None

        # Print package with version
        if package_version is not None:
            print(f"> {pkg}: {package_version}")

    if not_installed:
        print()
        print("Optional packages not installed")
        print("-------------------------------")
        for pkg in not_installed:
            print(f"> {pkg}")