collect_env.py

# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.

# mypy: allow-untyped-defs

# Unlike the rest of the PyTorch this file must be python2 compliant.
# This script outputs relevant system environment info
# Run it with `python util/collect_env.py` or `python -m util.collect_env`

import datetime
import json
import locale
import os
import re
import subprocess
import sys
from collections import namedtuple


try:
    import torch

    TORCH_AVAILABLE = True
except (ImportError, NameError, AttributeError, OSError):
    TORCH_AVAILABLE = False

# System Environment Information
SystemEnv = namedtuple(
    "SystemEnv",
    [
        "torch_version",
        "is_debug_build",
        "cuda_compiled_version",
        "gcc_version",
        "clang_version",
        "cmake_version",
        "os",
        "libc_version",
        "python_version",
        "python_platform",
        "is_cuda_available",
        "cuda_runtime_version",
        "cuda_module_loading",
        "nvidia_driver_version",
        "nvidia_gpu_models",
        "cudnn_version",
        "pip_version",  # 'pip' or 'pip3'
        "pip_packages",
        "conda_packages",
        "hip_compiled_version",
        "hip_runtime_version",
        "miopen_runtime_version",
        "caching_allocator_config",
        "is_xnnpack_available",
        "cpu_info",
    ],
)

COMMON_PATTERNS = [
    "torch",
    "numpy",
    "triton",
    "optree",
]

NVIDIA_PATTERNS = [
    "cuda-cudart",
    "cuda-cupti",
    "cuda-libraries",
    "cuda-opencl",
    "cuda-nvrtc",
    "cuda-runtime",
    "cublas",
    "cudnn",
    "cufft",
    "curand",
    "cusolver",
    "cusparse",
    "nccl",
    "nvjitlink",
    "nvtx",
]

CONDA_PATTERNS = [
    "cudatoolkit",
    "soumith",
    "mkl",
    "magma",
]

PIP_PATTERNS = [
    "mypy",
    "flake8",
    "onnx",
]


def run(command):
    """Return (return-code, stdout, stderr)."""
    shell = True if type(command) is str else False
    p = subprocess.Popen(
        command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=shell
    )
    raw_output, raw_err = p.communicate()
    rc = p.returncode
    if get_platform() == "win32":
        enc = "oem"
    else:
        enc = locale.getpreferredencoding()
    output = raw_output.decode(enc)
    err = raw_err.decode(enc)
    return rc, output.strip(), err.strip()


def run_and_read_all(run_lambda, command):
    """Run command using run_lambda; reads and returns entire output if rc is 0."""
    rc, out, _ = run_lambda(command)
    if rc != 0:
        return None
    return out


def run_and_parse_first_match(run_lambda, command, regex):
    """Run command using run_lambda, returns the first regex match if it exists."""
    rc, out, _ = run_lambda(command)
    if rc != 0:
        return None
    match = re.search(regex, out)
    if match is None:
        return None
    return match.group(1)


def run_and_return_first_line(run_lambda, command):
    """Run command using run_lambda and returns first line if output is not empty."""
    rc, out, _ = run_lambda(command)
    if rc != 0:
        return None
    return out.split("\n")[0]


def get_conda_packages(run_lambda, patterns=None):
    if patterns is None:
        patterns = CONDA_PATTERNS + COMMON_PATTERNS + NVIDIA_PATTERNS
    conda = os.environ.get("CONDA_EXE", "conda")
    out = run_and_read_all(run_lambda, "{} list".format(conda))
    if out is None:
        return out

    return "\n".join(
        line
        for line in out.splitlines()
        if not line.startswith("#") and any(name in line for name in patterns)
    )


def get_gcc_version(run_lambda):
    return run_and_parse_first_match(run_lambda, "gcc --version", r"gcc (.*)")


def get_clang_version(run_lambda):
    return run_and_parse_first_match(
        run_lambda, "clang --version", r"clang version (.*)"
    )


def get_cmake_version(run_lambda):
    return run_and_parse_first_match(run_lambda, "cmake --version", r"cmake (.*)")


def get_nvidia_driver_version(run_lambda):
    if get_platform() == "darwin":
        cmd = "kextstat | grep -i cuda"
        return run_and_parse_first_match(
            run_lambda, cmd, r"com[.]nvidia[.]CUDA [(](.*?)[)]"
        )
    smi = get_nvidia_smi()
    return run_and_parse_first_match(run_lambda, smi, r"Driver Version: (.*?) ")


def get_gpu_info(run_lambda):
    if get_platform() == "darwin" or (
        TORCH_AVAILABLE
        and hasattr(torch.version, "hip")
        and torch.version.hip is not None
    ):
        if TORCH_AVAILABLE and torch.cuda.is_available():
            if torch.version.hip is not None:
                prop = torch.cuda.get_device_properties(0)
                if hasattr(prop, "gcnArchName"):
                    gcnArch = " ({})".format(prop.gcnArchName)
                else:
                    gcnArch = "NoGCNArchNameOnOldPyTorch"
            else:
                gcnArch = ""
            return torch.cuda.get_device_name(None) + gcnArch
        return None
    smi = get_nvidia_smi()
    uuid_regex = re.compile(r" \(UUID: .+?\)")
    rc, out, _ = run_lambda(smi + " -L")
    if rc != 0:
        return None
    # Anonymize GPUs by removing their UUID
    return re.sub(uuid_regex, "", out)


def get_running_cuda_version(run_lambda):
    return run_and_parse_first_match(run_lambda, "nvcc --version", r"release .+ V(.*)")


def get_cudnn_version(run_lambda):
    """Return a list of libcudnn.so; it's hard to tell which one is being used."""
    if get_platform() == "win32":
        system_root = os.environ.get("SYSTEMROOT", "C:\\Windows")
        cuda_path = os.environ.get("CUDA_PATH", "%CUDA_PATH%")
        where_cmd = os.path.join(system_root, "System32", "where")
        cudnn_cmd = '{} /R "{}\\bin" cudnn*.dll'.format(where_cmd, cuda_path)
    elif get_platform() == "darwin":
        # CUDA libraries and drivers can be found in /usr/local/cuda/. See
        # https://docs.nvidia.com/cuda/archive/10.1/cuda-installation-guide-mac-os-x/index.html#3.2-Install
        # Use CUDNN_LIBRARY when cudnn library is installed elsewhere.
        cudnn_cmd = "ls /usr/local/cuda/lib/libcudnn*"
    else:
        cudnn_cmd = 'ldconfig -p | grep libcudnn | rev | cut -d" " -f1 | rev'
    rc, out, _ = run_lambda(cudnn_cmd)
    # find will return 1 if there are permission errors or if not found
    if len(out) == 0 or (rc != 1 and rc != 0):
        cudnn_lib = os.environ.get("CUDNN_LIBRARY")
        if cudnn_lib is not None and os.path.isfile(cudnn_lib):
            return os.path.realpath(cudnn_lib)
        return None
    files_set = set()
    for fn in out.split("\n"):
        fn = os.path.realpath(fn)  # eliminate symbolic links
        if os.path.isfile(fn):
            files_set.add(fn)
    if not files_set:
        return None
    # Alphabetize the result because the order is non-deterministic otherwise
    files = sorted(files_set)
    if len(files) == 1:
        return files[0]
    result = "\n".join(files)
    return "Probably one of the following:\n{}".format(result)


def get_nvidia_smi():
    # Note: nvidia-smi is currently available only on Windows and Linux
    smi = "nvidia-smi"
    if get_platform() == "win32":
        system_root = os.environ.get("SYSTEMROOT", "C:\\Windows")
        program_files_root = os.environ.get("PROGRAMFILES", "C:\\Program Files")
        legacy_path = os.path.join(
            program_files_root, "NVIDIA Corporation", "NVSMI", smi
        )
        new_path = os.path.join(system_root, "System32", smi)
        smis = [new_path, legacy_path]
        for candidate_smi in smis:
            if os.path.exists(candidate_smi):
                smi = '"{}"'.format(candidate_smi)
                break
    return smi


# example outputs of CPU infos
#  * linux
#    Architecture:            x86_64
#      CPU op-mode(s):        32-bit, 64-bit
#      Address sizes:         46 bits physical, 48 bits virtual
#      Byte Order:            Little Endian
#    CPU(s):                  128
#      On-line CPU(s) list:   0-127
#    Vendor ID:               GenuineIntel
#      Model name:            Intel(R) Xeon(R) Platinum 8375C CPU @ 2.90GHz
#        CPU family:          6
#        Model:               106
#        Thread(s) per core:  2
#        Core(s) per socket:  32
#        Socket(s):           2
#        Stepping:            6
#        BogoMIPS:            5799.78
#        Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr
#                             sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl
#                             xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq monitor ssse3 fma cx16
#                             pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand
#                             hypervisor lahf_lm abm 3dnowprefetch invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced
#                             fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid avx512f avx512dq rdseed adx smap
#                             avx512ifma clflushopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1
#                             xsaves wbnoinvd ida arat avx512vbmi pku ospke avx512_vbmi2 gfni vaes vpclmulqdq
#                             avx512_vnni avx512_bitalg tme avx512_vpopcntdq rdpid md_clear flush_l1d arch_capabilities
#    Virtualization features:
#      Hypervisor vendor:     KVM
#      Virtualization type:   full
#    Caches (sum of all):
#      L1d:                   3 MiB (64 instances)
#      L1i:                   2 MiB (64 instances)
#      L2:                    80 MiB (64 instances)
#      L3:                    108 MiB (2 instances)
#    NUMA:
#      NUMA node(s):          2
#      NUMA node0 CPU(s):     0-31,64-95
#      NUMA node1 CPU(s):     32-63,96-127
#    Vulnerabilities:
#      Itlb multihit:         Not affected
#      L1tf:                  Not affected
#      Mds:                   Not affected
#      Meltdown:              Not affected
#      Mmio stale data:       Vulnerable: Clear CPU buffers attempted, no microcode; SMT Host state unknown
#      Retbleed:              Not affected
#      Spec store bypass:     Mitigation; Speculative Store Bypass disabled via prctl and seccomp
#      Spectre v1:            Mitigation; usercopy/swapgs barriers and __user pointer sanitization
#      Spectre v2:            Mitigation; Enhanced IBRS, IBPB conditional, RSB filling, PBRSB-eIBRS SW sequence
#      Srbds:                 Not affected
#      Tsx async abort:       Not affected
#  * win32
#    Architecture=9
#    CurrentClockSpeed=2900
#    DeviceID=CPU0
#    Family=179
#    L2CacheSize=40960
#    L2CacheSpeed=
#    Manufacturer=GenuineIntel
#    MaxClockSpeed=2900
#    Name=Intel(R) Xeon(R) Platinum 8375C CPU @ 2.90GHz
#    ProcessorType=3
#    Revision=27142
#
#    Architecture=9
#    CurrentClockSpeed=2900
#    DeviceID=CPU1
#    Family=179
#    L2CacheSize=40960
#    L2CacheSpeed=
#    Manufacturer=GenuineIntel
#    MaxClockSpeed=2900
#    Name=Intel(R) Xeon(R) Platinum 8375C CPU @ 2.90GHz
#    ProcessorType=3
#    Revision=27142


def get_cpu_info(run_lambda):
    rc, out, err = 0, "", ""
    if get_platform() == "linux":
        rc, out, err = run_lambda("lscpu")
    elif get_platform() == "win32":
        rc, out, err = run_lambda(
            'powershell.exe "gwmi -Class Win32_Processor | Select-Object -Property Name,Manufacturer,Family,\
            Architecture,ProcessorType,DeviceID,CurrentClockSpeed,MaxClockSpeed,L2CacheSize,L2CacheSpeed,Revision\
            | ConvertTo-Json"'
        )
        if rc == 0:
            lst = []
            try:
                obj = json.loads(out)
                if type(obj) is list:
                    for o in obj:
                        lst.append("----------------------")
                        lst.extend([f"{k}: {v}" for (k, v) in o.items()])
                else:
                    lst.extend([f"{k}: {v}" for (k, v) in obj.items()])
            except ValueError as e:
                lst.append(out)
                lst.append(str(e))
            out = "\n".join(lst)
    elif get_platform() == "darwin":
        rc, out, err = run_lambda("sysctl -n machdep.cpu.brand_string")
    cpu_info = "None"
    if rc == 0:
        cpu_info = out
    else:
        cpu_info = err
    return cpu_info


def get_platform():
    if sys.platform.startswith("linux"):
        return "linux"
    elif sys.platform.startswith("win32"):
        return "win32"
    elif sys.platform.startswith("cygwin"):
        return "cygwin"
    elif sys.platform.startswith("darwin"):
        return "darwin"
    else:
        return sys.platform


def get_mac_version(run_lambda):
    return run_and_parse_first_match(run_lambda, "sw_vers -productVersion", r"(.*)")


def get_windows_version(run_lambda):
    ret = run_and_read_all(
        run_lambda,
        'powershell.exe "gwmi -Class Win32_OperatingSystem | Select-Object -Property Caption,\
        OSArchitecture,Version | ConvertTo-Json"',
    )
    try:
        obj = json.loads(ret)
        ret = f'{obj["Caption"]} ({obj["Version"]} {obj["OSArchitecture"]})'
    except ValueError as e:
        ret += f"\n{str(e)}"
    return ret


def get_lsb_version(run_lambda):
    return run_and_parse_first_match(
        run_lambda, "lsb_release -a", r"Description:\t(.*)"
    )


def check_release_file(run_lambda):
    return run_and_parse_first_match(
        run_lambda, "cat /etc/*-release", r'PRETTY_NAME="(.*)"'
    )


def get_os(run_lambda):
    from platform import machine

    platform = get_platform()

    if platform == "win32" or platform == "cygwin":
        return get_windows_version(run_lambda)

    if platform == "darwin":
        version = get_mac_version(run_lambda)
        if version is None:
            return None
        return "macOS {} ({})".format(version, machine())

    if platform == "linux":
        # Ubuntu/Debian based
        desc = get_lsb_version(run_lambda)
        if desc is not None:
            return "{} ({})".format(desc, machine())

        # Try reading /etc/*-release
        desc = check_release_file(run_lambda)
        if desc is not None:
            return "{} ({})".format(desc, machine())

        return "{} ({})".format(platform, machine())

    # Unknown platform
    return platform


def get_python_platform():
    import platform

    return platform.platform()


def get_libc_version():
    import platform

    if get_platform() != "linux":
        return "N/A"
    return "-".join(platform.libc_ver())


def get_pip_packages(run_lambda, patterns=None):
    """Return `pip list` output. Note: will also find conda-installed pytorch and numpy packages."""
    if patterns is None:
        patterns = PIP_PATTERNS + COMMON_PATTERNS + NVIDIA_PATTERNS

    pip_version = "pip3" if sys.version[0] == "3" else "pip"

    os.environ["PIP_DISABLE_PIP_VERSION_CHECK"] = "1"
    # People generally have pip as `pip` or `pip3`
    # But here it is invoked as `python -mpip`
    out = run_and_read_all(
        run_lambda, [sys.executable, "-mpip", "list", "--format=freeze"]
    )
    filtered_out = "\n".join(
        line for line in out.splitlines() if any(name in line for name in patterns)
    )

    return pip_version, filtered_out


def get_cachingallocator_config():
    ca_config = os.environ.get("PYTORCH_CUDA_ALLOC_CONF", "")
    return ca_config


def get_cuda_module_loading_config():
    if TORCH_AVAILABLE and torch.cuda.is_available():
        torch.cuda.init()
        config = os.environ.get("CUDA_MODULE_LOADING", "")
        return config
    else:
        return "N/A"


def is_xnnpack_available():
    if TORCH_AVAILABLE:
        import torch.backends.xnnpack

        return str(torch.backends.xnnpack.enabled)  # type: ignore[attr-defined]
    else:
        return "N/A"


def get_env_info():
    """
    Collects environment information to aid in debugging.

    The returned environment information contains details on torch version, is debug build
    or not, cuda compiled version, gcc version, clang version, cmake version, operating
    system, libc version, python version, python platform, CUDA availability, CUDA
    runtime version, CUDA module loading config, GPU model and configuration, Nvidia
    driver version, cuDNN version, pip version and versions of relevant pip and
    conda packages, HIP runtime version, MIOpen runtime version,
    Caching allocator config, XNNPACK availability and CPU information.

    Returns:
        SystemEnv (namedtuple): A tuple containining various environment details
            and system information.
    """
    run_lambda = run
    pip_version, pip_list_output = get_pip_packages(run_lambda)

    if TORCH_AVAILABLE:
        version_str = torch.__version__
        debug_mode_str = str(torch.version.debug)
        cuda_available_str = str(torch.cuda.is_available())
        cuda_version_str = torch.version.cuda
        if (
            not hasattr(torch.version, "hip") or torch.version.hip is None
        ):  # cuda version
            hip_compiled_version = hip_runtime_version = miopen_runtime_version = "N/A"
        else:  # HIP version

            def get_version_or_na(cfg, prefix):
                _lst = [s.rsplit(None, 1)[-1] for s in cfg if prefix in s]
                return _lst[0] if _lst else "N/A"

            cfg = torch._C._show_config().split("\n")
            hip_runtime_version = get_version_or_na(cfg, "HIP Runtime")
            miopen_runtime_version = get_version_or_na(cfg, "MIOpen")
            cuda_version_str = "N/A"
            hip_compiled_version = torch.version.hip
    else:
        version_str = debug_mode_str = cuda_available_str = cuda_version_str = "N/A"
        hip_compiled_version = hip_runtime_version = miopen_runtime_version = "N/A"

    sys_version = sys.version.replace("\n", " ")

    conda_packages = get_conda_packages(run_lambda)

    return SystemEnv(
        torch_version=version_str,
        is_debug_build=debug_mode_str,
        python_version="{} ({}-bit runtime)".format(
            sys_version, sys.maxsize.bit_length() + 1
        ),
        python_platform=get_python_platform(),
        is_cuda_available=cuda_available_str,
        cuda_compiled_version=cuda_version_str,
        cuda_runtime_version=get_running_cuda_version(run_lambda),
        cuda_module_loading=get_cuda_module_loading_config(),
        nvidia_gpu_models=get_gpu_info(run_lambda),
        nvidia_driver_version=get_nvidia_driver_version(run_lambda),
        cudnn_version=get_cudnn_version(run_lambda),
        hip_compiled_version=hip_compiled_version,
        hip_runtime_version=hip_runtime_version,
        miopen_runtime_version=miopen_runtime_version,
        pip_version=pip_version,
        pip_packages=pip_list_output,
        conda_packages=conda_packages,
        os=get_os(run_lambda),
        libc_version=get_libc_version(),
        gcc_version=get_gcc_version(run_lambda),
        clang_version=get_clang_version(run_lambda),
        cmake_version=get_cmake_version(run_lambda),
        caching_allocator_config=get_cachingallocator_config(),
        is_xnnpack_available=is_xnnpack_available(),
        cpu_info=get_cpu_info(run_lambda),
    )


env_info_fmt = """
PyTorch version: {torch_version}
Is debug build: {is_debug_build}
CUDA used to build PyTorch: {cuda_compiled_version}
ROCM used to build PyTorch: {hip_compiled_version}

OS: {os}
GCC version: {gcc_version}
Clang version: {clang_version}
CMake version: {cmake_version}
Libc version: {libc_version}

Python version: {python_version}
Python platform: {python_platform}
Is CUDA available: {is_cuda_available}
CUDA runtime version: {cuda_runtime_version}
CUDA_MODULE_LOADING set to: {cuda_module_loading}
GPU models and configuration: {nvidia_gpu_models}
Nvidia driver version: {nvidia_driver_version}
cuDNN version: {cudnn_version}
HIP runtime version: {hip_runtime_version}
MIOpen runtime version: {miopen_runtime_version}
Is XNNPACK available: {is_xnnpack_available}

CPU:
{cpu_info}

Versions of relevant libraries:
{pip_packages}
{conda_packages}
""".strip()


def pretty_str(envinfo):  # noqa: C901
    def replace_nones(dct, replacement="Could not collect"):
        for key in dct.keys():
            if dct[key] is not None:
                continue
            dct[key] = replacement
        return dct

    def replace_bools(dct, true="Yes", false="No"):
        for key in dct.keys():
            if dct[key] is True:
                dct[key] = true
            elif dct[key] is False:
                dct[key] = false
        return dct

    def prepend(text, tag="[prepend]"):
        lines = text.split("\n")
        updated_lines = [tag + line for line in lines]
        return "\n".join(updated_lines)

    def replace_if_empty(text, replacement="No relevant packages"):
        if text is not None and len(text) == 0:
            return replacement
        return text

    def maybe_start_on_next_line(string):
        # If `string` is multiline, prepend a \n to it.
        if string is not None and len(string.split("\n")) > 1:
            return "\n{}\n".format(string)
        return string

    mutable_dict = envinfo._asdict()

    # If nvidia_gpu_models is multiline, start on the next line
    mutable_dict["nvidia_gpu_models"] = maybe_start_on_next_line(
        envinfo.nvidia_gpu_models
    )

    # If the machine doesn't have CUDA, report some fields as 'No CUDA'
    dynamic_cuda_fields = [
        "cuda_runtime_version",
        "nvidia_gpu_models",
        "nvidia_driver_version",
    ]
    all_cuda_fields = dynamic_cuda_fields + ["cudnn_version"]
    all_dynamic_cuda_fields_missing = all(
        mutable_dict[field] is None for field in dynamic_cuda_fields
    )
    if (
        TORCH_AVAILABLE
        and not torch.cuda.is_available()
        and all_dynamic_cuda_fields_missing
    ):
        for field in all_cuda_fields:
            mutable_dict[field] = "No CUDA"
        if envinfo.cuda_compiled_version is None:
            mutable_dict["cuda_compiled_version"] = "None"

    # Replace True with Yes, False with No
    mutable_dict = replace_bools(mutable_dict)

    # Replace all None objects with 'Could not collect'
    mutable_dict = replace_nones(mutable_dict)

    # If either of these are '', replace with 'No relevant packages'
    mutable_dict["pip_packages"] = replace_if_empty(mutable_dict["pip_packages"])
    mutable_dict["conda_packages"] = replace_if_empty(mutable_dict["conda_packages"])

    # Tag conda and pip packages with a prefix
    # If they were previously None, they'll show up as ie '[conda] Could not collect'
    if mutable_dict["pip_packages"]:
        mutable_dict["pip_packages"] = prepend(
            mutable_dict["pip_packages"], "[{}] ".format(envinfo.pip_version)
        )
    if mutable_dict["conda_packages"]:
        mutable_dict["conda_packages"] = prepend(
            mutable_dict["conda_packages"], "[conda] "
        )
    mutable_dict["cpu_info"] = envinfo.cpu_info
    return env_info_fmt.format(**mutable_dict)


def get_pretty_env_info():
    """
    Returns a pretty string of environment information.

    This function retrieves environment information by calling the `get_env_info` function
    and then formats the information into a human-readable string. The retrieved environment
    information is listed in the document of `get_env_info`.
    This function is used in `python collect_env.py` that should be executed when reporting a bug.

    Returns:
        str: A pretty string of the environment information.
    """
    return pretty_str(get_env_info())


def main():
    print("Collecting environment information...")
    output = get_pretty_env_info()
    print(output)

    if (
        TORCH_AVAILABLE
        and hasattr(torch, "utils")
        and hasattr(torch.utils, "_crash_handler")
    ):
        minidump_dir = torch.utils._crash_handler.DEFAULT_MINIDUMP_DIR
        if sys.platform == "linux" and os.path.exists(minidump_dir):
            dumps = [
                os.path.join(minidump_dir, dump) for dump in os.listdir(minidump_dir)
            ]
            latest = max(dumps, key=os.path.getctime)
            ctime = os.path.getctime(latest)
            creation_time = datetime.datetime.fromtimestamp(ctime).strftime(
                "%Y-%m-%d %H:%M:%S"
            )
            msg = (
                "\n*** Detected a minidump at {} created on {}, ".format(
                    latest, creation_time
                )
                + "if this is related to your bug please include it when you file a report ***"
            )
            print(msg, file=sys.stderr)


if __name__ == "__main__":
    main()