Added Python3 compatible xpc client. (#156)

Python3/src/basicExample.py

@@ -0,0 +1,72 @@
+from time import sleep
+import xpc
+
+def ex():
+    print "X-Plane Connect example script"
+    print "Setting up simulation"
+    with xpc.XPlaneConnect() as client:
+        # Verify connection
+        try:
+            # If X-Plane does not respond to the request, a timeout error
+            # will be raised.
+            client.getDREF("sim/test/test_float")
+        except:
+            print "Error establishing connection to X-Plane."
+            print "Exiting..."
+            return
+
+        # Set position of the player aircraft
+        print "Setting position"
+        #       Lat     Lon         Alt   Pitch Roll Yaw Gear
+        posi = [37.524, -122.06899, 2500, 0,    0,   0,  1]
+        client.sendPOSI(posi)
+        
+        # Set position of a non-player aircraft
+        print "Setting NPC position"
+        #       Lat       Lon         Alt   Pitch Roll Yaw Gear
+        posi = [37.52465, -122.06899, 2500, 0,    20,   0,  1]
+        client.sendPOSI(posi, 1)
+
+        # Set angle of attack, velocity, and orientation using the DATA command
+        print "Setting orientation"
+        data = [\
+            [18,   0, -998,   0, -998, -998, -998, -998, -998],\
+            [ 3, 130,  130, 130,  130, -998, -998, -998, -998],\
+            [16,   0,    0,   0, -998, -998, -998, -998, -998]\
+            ]
+        client.sendDATA(data)
+
+        # Set control surfaces and throttle of the player aircraft using sendCTRL
+        print "Setting controls"
+        ctrl = [0.0, 0.0, 0.0, 0.8]
+        client.sendCTRL(ctrl)
+
+        # Pause the sim
+        print "Pausing"
+        client.pauseSim(True)
+        sleep(2)
+
+        # Toggle pause state to resume
+        print "Resuming"
+        client.pauseSim(False)
+
+        # Stow landing gear using a dataref
+        print "Stowing gear"
+        gear_dref = "sim/cockpit/switches/gear_handle_status"
+        client.sendDREF(gear_dref, 0)
+
+        # Let the sim run for a bit.
+        sleep(4)
+
+        # Make sure gear was stowed successfully
+        gear_status = client.getDREF(gear_dref)
+        if gear_status[0] == 0:
+            print "Gear stowed"
+        else:
+            print "Error stowing gear"
+
+        print "End of Python client example"
+        raw_input("Press any key to exit...")
+
+if __name__ == "__main__":
+    ex()