Hardware Managers

The first step to retrieving hardware information is to instantiate a HardwareManager.

Depending on the OS present, PySysInfo can automatically load the appropriate Hardware Manager class. The Hardware Manager classes implement the structure of HardwareManagerInterface.

Instantiating a Hardware Manager

Instantiating a hardware manager is the same regardless of the OS. The following codeblock shows how a HardwareManager is instantiated.

import pysysinfo
from pysysinfo.models.info_models import HardwareManagerInterface

hm = pysysinfo.HardwareManager()

print(type(hm))
print(isinstance(hm, HardwareManagerInterface))

Output:

<class 'pysysinfo.core.mac.MacHardwareManager'>
True

The type of HardwareManager instantiated depends on the OS. On macOS, as we can see, the MacHardwareManager was instantiated.

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Depending on your OS, when HardwareManager() is called, one of the following classes will be instantiated:

class WindowsHardwareManager

Uses Registry and WMI to extract info.

class MacHardwareManager

Uses sysctl and IOreg to extract info.

class LinuxHardwareManager

Uses the sysfs pseudo file system to extract info.

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All HardwareManager classes have the following property and methods:

class HardwareManagerInterface

The hardware manager of every OS follows this structure.

info: HardwareInfo

When any component’s data is queried, the data is stored here.

fetch_hardware_info() → HardwareInfo

Fetches all hardware Information.

fetch_cpu_info() → CPUInfo

Fetches CPU Information.

fetch_graphics_info() → GraphicsInfo

Fetches GPU Information.

fetch_memory_info() → MemoryInfo

Fetches RAM Information.

fetch_storage_info() → StorageInfo

Fetches Disk Information.

fetch_network_info() → NetworkInfo

Fetches Network Information.

fetch_display_info() → DisplayInfo

Fetches Display Information.

fetch_audio_info() → AudioInfo

Fetches Audio Information.

fetch_baseboard_info() → BaseboardInfo

Fetches Baseboard Information.

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We can now use this knowledge to query information about the hardware.

import pysysinfo

hm = pysysinfo.HardwareManager()

info = hm.fetch_hardware_info()
print(type(info))

Output on a macOS machine:

<class 'pysysinfo.models.info_models.MacHardwareInfo'>

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Information can be queried all at once, or on a per-component basis.

fetch_hardware_info() can be used to query all info.

The other methods in the HardwareManagerInterface class can be used to query each component.

We explore this in the Querying Info section.