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Base class for all monitors.
Monitors provide data about the running system to Plugin objects, which use the data
to tune system parameters.
Following methods require reimplementation:
- _init_available_devices(cls)
- update(cls)
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�z!Monitor._update_available_devicesc C s | j S r )r r r r r �get_available_devices+ s z Monitor.get_available_devicesc C s
t � �d S r r r r r r �update/ s zMonitor.updatec C s | j �|� d S r )r �add�r �instancer r r �_register_instance3 s zMonitor._register_instancec C s | j �|� d S r )r �remover r r r �_deregister_instance7 s z Monitor._deregister_instancec C s6 t � }| jD ]}||jO }q | j�� | j�|� d S r )r r �devicesr �clearr )r Z new_updatingr r r r �_refresh_updating_devices; s
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zMonitor.cleanupc C s | j S r ��_devicesr' r r r r a s zMonitor.devicesc C s | j t|�@ }|| _| �� d S r )r r r* r! )r$ �valueZ new_devicesr r r r e s c C s. | � � || jv r*| j�|� | j�|� d S r )r r r* r r �r$ Zdevicer r r �
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