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Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
book

Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

by Steven Lawrence Fernandes, Tim Cox
April 2018
Beginner content levelBeginner
552 pages
13h 58m
English
Packt Publishing
Content preview from Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

Taking screenshots

The pi3d library includes a useful screenshot function to capture the screen in a .jpg or .png file. We can add a new key event to trigger it and call pi3d.screenshot("filename.jpg") to save an image (or use a counter to take multiple screenshots), as shown in the following code:

shotnum = 0 #Set counter to 0 
while DISPLAY.loop_running() 
... 
  if inputs.key_state("KEY_P"): 
    while inputs.key_state("KEY_P"): 
      inputs.do_input_events()         # wait for key to go up 
      pi3d.screenshot("screenshot%04d.jpg"%( shotnum)) 
      shotnum += 1 
... 
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Publisher Resources

ISBN: 9781788629874Supplemental Content