PyUSB with Brecknell Scale

I’m working on getting a weight from a usb scale using python and PyUSB. Here’s my code import sys import usb.core import usb.util from reports import \ ReportFactory, STATUSES, ZERO_WEIGHT, STABLE_WEIGHT, DATA_REPORT device = usb.core.find(idVendor=0x67b, idProduct=0x2303) if device is None: raise ValueError(‘Device Not Found’) if device.is_kernel_driver_active(0) is True: device.detach_kernel_driver(0) usb.util.claim_interface(device, 0) device.set_configuration() collected = 0…

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Kafka Topic Retention and impact on the State store in Kafka streams

I have a state store (using Materialized.as()) in Kafka streams word-count application. Based on my understanding the state-store is maintained in Kafka internal topic. Following questions are : Can state-stores have unlimited key-value pairs, or they are governed by the rules of kafka topics based on the log.retention policies or log.segment.bytes? I set the log.retention.ms=60000…

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How to load a text file, add it to an array and change it into an object?

I am creating a program to display restaurant reviews which are saved in a text file. The text file is read in via the DAOimpl class as shown. public class DAOlmpl implements DAOInterface { static final char DELIMITER=’,’; /**@Override*/ public Repository load(String filename) { Repository repository = new Repository(); try (BufferedReader br = new BufferedReader(new…

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WPF: ListViewIndex from PreviewMouseLeftButtonDown event using command

I want to get index of ListViewIndex from PreviewMouseLeftButtonDown event using command: <ListView Name=”ListViewFiles”> <i:Interaction.Triggers> <i:EventTrigger EventName=”PreviewMouseLeftButtonDown”> <i:InvokeCommandAction Command=”{Binding ListViewItemMouseLeftButtonDownCommand}” CommandParameter=”{Binding ElementName=ListViewFiles, Path=SelectedItem}”/> </i:EventTrigger> </i:Interaction.Triggers> </ListView> Code: Here i have my ListView and i cannot find a way to get my ListViewItem index or object. I try SelectedItem but its null public void Execute(object parameter)…

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