Hacker News is a site where users can submit articles from across the internet (usually about technology and startups), and others can “upvote” the articles, signifying that they like them. That said, don’t worry too much about prerequisites! We’ll explain everything we’re doing as we go along, so let’s dive in! Getting Familiar with the Data Recently, we’ve released two new, interactive command line courses: Command Line Elements and Text Processing in the Command Line, so if you want to dig deeper into the command line, we recommend those as well
If you haven’t worked with Python before, feel free to check out our lesson covering the fundamentals of Python functions, or dig deeper into some of our data science courses. This tutorial assumes basic knowledge of functions, and a little command line experience wouldn’t hurt either. Let’s say you want to make a website to help people make Hacker News posts with ideal headlines and sublesson times. Notebooks are great for quick data visualization and exploration, but Python scripts are the way to put anything we learn into production.
In this tutorial, we’re going to dig into how to transform data using Python scripts and the command line.īut first, it’s worth asking the question you may be thinking: “How does Python fit into the command line and why would I ever want to interact with Python using the command line when I know I can do all my data science work using IPython notebooks or Jupyter lab?” Time0 = ( e2 – e1) / cv2.OctoTutorial: Transforming Data with Python Scripts and the Command Line savez( 'training_data_temp/test08.npz', train = train, train_labels = train_labels)
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# reshape the roi image into one row array Testing – First Build of Car with components Wirelessly stream video and capture using opencv2 and slice into jpeg, preprocess and reshape numpy and feed array into with key press data as label. I take the stream color stream 320×240 and down sample and grayscale video frames for preprocessing into a numpy matrix. On my MacBookPro laptop computer, I run another client python program to connect to Raspberry Pi using basic sockets. I send the captured stream across the wifi network back to my MacBookPro using python server implementation using basic sockets. The webcam captures video frames of the road ahead at ~24 fps. I pointed it down so it could see the hood and some of the “road”. On the first iteration of the physical devices, I mounted the disassembled Logitech C270/Raspberry Pi on the car with a coat hanger that I chopped up and modified to hold the camera. Testing – Capturing image data for training dataset If keyinput and keyinput:Įlif keyinput and keyinput:Įlif keyinput or keyinput: initialize the digital pins as an output. Case 3: demoOne() demoTwo() order=0 break Ĭase 21: rightTurnForward(time) order=0 break Ĭase 22: leftTurnForward(time) order=0 break Ĭase 23: rightTurnReverse(time) order=0 break Ĭase 24: leftTurnReverse(time) order=0 break ĭefault: Serial.print("\nINVALID ORDER!… TURNING OFF!\n")