print_distance.py

import ctypes
from typing import List, Any, Union

class Sonic (object):
    def __init__(self):
        self.sonic = ctypes.CDLL ("/usr/local/lib/libsonic.so")
        self.sonic.measure.restype = ctypes.c_double
        self.sonic.initialize()

    def getDistance(self, val):
        results = []
        # FIXME: How many sonic devices have you plugged in? default: 7
        for i in range (val):
            returnValue = self.sonic.measure (ctypes.c_uint (i))
            if returnValue == 0:
                i -= 1
            else:
                results.append (round (returnValue, 2))
        return results

#sonic = Sonic ()
#try:
#    while True:
#        distance = sonic.getDistance()
#        # print(distance)
#        print("left: ", distance[0], " left45: ", distance[1], " left_front: ", distance[2], " right_front: ", distance[3], " right45: ", distance[4], " right: ", distance[5], " back: ", distance[6])

#except KeyboardInterrupt:
#    print ("ende")