# Hello Query Device Python* Sample {#openvino_inference_engine_ie_bridges_python_sample_hello_query_device_README}

This sample demonstrates how to show OpenVINO™ Runtime devices and prints their metrics and default configuration values using [Query Device API feature](../../../docs/OV_Runtime_UG/supported_plugins/config_properties.md).

The following Python API is used in the application:

| Feature      | API                                                                                                               | Description           |
| :----------- | :---------------------------------------------------------------------------------------------------------------- | :-------------------- |
| Basic        | [openvino.runtime.Core]                                                                                           | Common API            |
| Query Device | [openvino.runtime.Core.available_devices], [openvino.runtime.Core.get_metric], [openvino.runtime.Core.get_config] | Get device properties |

| Options                    | Values                                                            |
| :------------------------- | :---------------------------------------------------------------- |
| Supported devices          | [All](../../../docs/OV_Runtime_UG/supported_plugins/Supported_Devices.md) |
| Other language realization | [C++](../../../samples/cpp/hello_query_device/README.md)          |

## How It Works

The sample queries all available OpenVINO™ Runtime devices and prints their supported metrics and plugin configuration parameters.

## Running

The sample has no command-line parameters. To see the report, run the following command:

```
python hello_query_device.py
```

## Sample Output

The application prints all available devices with their supported metrics and default values for configuration parameters.
For example:

```
[ INFO ] Available devices:
[ INFO ] CPU :
[ INFO ]        SUPPORTED_METRICS:
[ INFO ]                AVAILABLE_DEVICES:
[ INFO ]                FULL_DEVICE_NAME: Intel(R) Core(TM) i5-8350U CPU @ 1.70GHz
[ INFO ]                OPTIMIZATION_CAPABILITIES: FP32, FP16, INT8, BIN
[ INFO ]                RANGE_FOR_ASYNC_INFER_REQUESTS: 1, 1, 1
[ INFO ]                RANGE_FOR_STREAMS: 1, 8
[ INFO ]                IMPORT_EXPORT_SUPPORT: True
[ INFO ]
[ INFO ]        SUPPORTED_CONFIG_KEYS (default values):
[ INFO ]                CACHE_DIR:
[ INFO ]                CPU_BIND_THREAD: NO
[ INFO ]                CPU_THREADS_NUM: 0
[ INFO ]                CPU_THROUGHPUT_STREAMS: 1
[ INFO ]                DUMP_EXEC_GRAPH_AS_DOT:
[ INFO ]                DYN_BATCH_ENABLED: NO
[ INFO ]                DYN_BATCH_LIMIT: 0
[ INFO ]                ENFORCE_BF16: NO
[ INFO ]                EXCLUSIVE_ASYNC_REQUESTS: NO
[ INFO ]                PERFORMANCE_HINT:
[ INFO ]                PERFORMANCE_HINT_NUM_REQUESTS: 0
[ INFO ]                PERF_COUNT: NO
[ INFO ]
[ INFO ] GNA :
[ INFO ]        SUPPORTED_METRICS:
[ INFO ]                AVAILABLE_DEVICES: GNA_SW
[ INFO ]                OPTIMAL_NUMBER_OF_INFER_REQUESTS: 1
[ INFO ]                FULL_DEVICE_NAME: GNA_SW
[ INFO ]                GNA_LIBRARY_FULL_VERSION: 3.0.0.1455
[ INFO ]                IMPORT_EXPORT_SUPPORT: True
[ INFO ]
[ INFO ]        SUPPORTED_CONFIG_KEYS (default values):
[ INFO ]                EXCLUSIVE_ASYNC_REQUESTS: NO
[ INFO ]                GNA_COMPACT_MODE: YES
[ INFO ]                GNA_COMPILE_TARGET:
[ INFO ]                GNA_DEVICE_MODE: GNA_SW_EXACT
[ INFO ]                GNA_EXEC_TARGET:
[ INFO ]                GNA_FIRMWARE_MODEL_IMAGE:
[ INFO ]                GNA_FIRMWARE_MODEL_IMAGE_GENERATION:
[ INFO ]                GNA_LIB_N_THREADS: 1
[ INFO ]                GNA_PRECISION: I16
[ INFO ]                GNA_PWL_MAX_ERROR_PERCENT: 1.000000
[ INFO ]                GNA_PWL_UNIFORM_DESIGN: NO
[ INFO ]                GNA_SCALE_FACTOR: 1.000000
[ INFO ]                GNA_SCALE_FACTOR_0: 1.000000
[ INFO ]                LOG_LEVEL: LOG_NONE
[ INFO ]                PERF_COUNT: NO
[ INFO ]                SINGLE_THREAD: YES
```

## See Also

- [Using OpenVINO™ Toolkit Samples](../../../docs/OV_Runtime_UG/Samples_Overview.md)

<!-- [openvino.runtime.Core]:
[openvino.runtime.Core.available_devices]:
[openvino.runtime.Core.get_metric]:
[openvino.runtime.Core.get_config]: -->