old_contents: # Lidar Project Distance Subsystem
  
  import serial
  import socket
  import time
  import sys
  sys.path.insert(0, "/home/pi/lidar/pi_approach/Libraries")
  import serverxclient as cli
  
  arduino_dist = serial.Serial('/dev/ttyUSB0',9600)
  client = cli.Client()
  
  class distance_controller(object):
  	"""An all-powerful distance-finding controller"""
  
  	def get_distance(self):
  		distance = arduino_dist.readline()
  		return distance
  
  	def setup_handshake(self):
  		connected = False
  		while not connected:
  			try:
  				client.socket_connection()
  				connected = True
  			except:
  				print "Failure"
  				time.sleep(2)
  		received_communication = client.receive_data()
  		if received_communication == "VERIFY?":
  			hand_shake = "DISTANCE!"
  			client.send_data(hand_shake)
  		else:
  			print "Unidentified communication"
  
  	def active_listen(self):
  		received_communication = client.receive_data()
  		if received_communication == "FIRE":
  			result = self.get_distance()
  			try:
  				test_int = int(result)
  				print result
  				client.send_data(result)
  			except:
  				print "Unexpected character"
  
  	def main(self):
  		self.setup_handshake()
  		while True:
  			self.active_listen()
  
  distance = distance_controller()
  distance.main()
  
new_contents: # Lidar Project Distance Subsystem
  
  import serial
  import socket
  import time
  import sys
  sys.path.insert(0, "/home/pi/lidar/pi_approach/Libraries")
  import serverxclient as cli
  
  arduino_dist = serial.Serial('/dev/ttyUSB0',9600)
  client = cli.Client()
  
  class distance_controller(object):
  	"""An all-powerful distance-finding controller"""
  
  	def get_distance(self):
  		distance = arduino_dist.readline()
  		return distance
  
  	def setup_handshake(self):
  		connected = False
  		while not connected:
  			try:
  				client.socket_connection()
  				connected = True
  			except:
  				print "Failure"
  				time.sleep(2)
  		received_communication = client.receive_data()
  		if received_communication == "VERIFY?":
  			hand_shake = "DISTANCE!"
  			client.send_data(hand_shake)
  		else:
  			print "Unidentified communication"
  
  	def active_listen(self):
  		received_communication = client.receive_data()
  		if received_communication == "FIRE":
  			result = self.get_distance()
  			try:
  				test_int = int(result)
  				print result
  				client.send_data(result)
  			except:
  				print "Unexpected character"
  				client.send_data("0")
  
  
  	def main(self):
  		self.setup_handshake()
  		while True:
  			self.active_listen()
  
  distance = distance_controller()
  distance.main()
  
subject: Add unexpected character bug fix