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#https://stackoverflow.com/questions/166506/finding-local-ip-addresses-using-pythons-stdlib #fatal_error
def get_ip(self):
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    try:
        # doesn't even have to be reachable
        s.connect(('10.255.255.255', 1))
        IP = s.getsockname()[0]
    except Exception:
        IP = '127.0.0.1'
    finally:

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def find_lines(frame):
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    gray = cv2.GaussianBlur(gray,(5,5),0)
    # ret, gray = cv2.threshold(gray,190,255,cv2.THRESH_BINARY_INV)
    
    edges = cv2.Canny(gray, 30, 150, apertureSize = 3)
    # edges = cv2.Canny(gray, 50, 200, apertureSize = 3)
    
    lines = cv2.HoughLines(edges, 1, np.pi/180, 200)
    if lines is not None:

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# Pretty Print.
from pprint import pprint



playsound #is the most straightforward package to use if you simply want to play a WAV or MP3 file. It offers no functionality other than simple playback.

simpleaudio #lets you play WAV files and NumPy arrays, and gives you options to check whether a file is still playing.

winsound #allows you to play WAV files or beep your speakers, but it works only on Windows.

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Manual USB camera settings in Linux
https://www.kurokesu.com/main/2016/01/16/manual-usb-camera-settings-in-linux/
  
uvcdynctrl libwebcam command line tool
http://www.linux-commands-examples.com/uvcdynctrl
  

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# Import the necessary packages
from pyzbar import pyzbar
import cv2
#--------------------------------------------------------------------------------------------------------#
def initCamera(camera_id, frame_width, frame_height):                          #Function to initialize the CV videocapture.
    
    print('==> Trying to initialize the camera...')
    cap = cv2.VideoCapture( int(camera_id) )                                   #Start VideoCapture with the appropriate camera ID.  
     
    if not cap.isOpened():                                                     #Test if the stream is opened.