old_contents: import atexit
  import multiprocessing
  
  from TSL2561 import TSL2561
  from MCP9808 import MCP9808
  import time
  
  
  def SensorsHelper(object):
      def __init__(self, pipe):
          self._pipe = pipe
  
      def sensors_thread(self):
          tsl = TSL2561(debug=0)
          mcp = MCP9808(debug=0)
          #tsl.set_gain(16)
  
          while True:
              #full = tsl.read_full()
              #ir = tsl.read_IR()
              lux = tsl.read_lux()
              #print("%d,%d = %d lux" % (full, ir, lux))
              temp = mcp.read_temp()
              #print("%0.2f degC" % temp)
  
              self._pipe.send({'lux': lux, 'temp': temp})
  
              time.sleep(1)
  
  
  class Sensors(object):
      ''' Class for reading and reporting sensor values '''
      def __init__(self):
          self._child_pipe, self._pipe = multiprocessing.Pipe(duplex=True)
          self._helper = SensorsHelper(self._child_pipe)
          self._readings = None
  
      def begin(self):
          self._p = multiprocessing.Process(target=self._helper.sensors_thread)
          self._p.start()
          atexit.register(self.end)
  
      def end(self):
          self._pipe.send('end')
          self._p.join()
  
      def get_latest(self):
          while self._pipe.poll():
              self._readings = self._pipe.recv()
          return self._readings
  
new_contents: import atexit
  import multiprocessing
  
  from TSL2561 import TSL2561
  from MCP9808 import MCP9808
  import time
  
  
  class SensorsHelper(object):
      def __init__(self, pipe):
          self._pipe = pipe
  
      def sensors_thread(self):
          tsl = TSL2561(debug=0)
          mcp = MCP9808(debug=0)
          #tsl.set_gain(16)
  
          while True:
              #full = tsl.read_full()
              #ir = tsl.read_IR()
              lux = tsl.read_lux()
              #print("%d,%d = %d lux" % (full, ir, lux))
              temp = mcp.read_temp()
              #print("%0.2f degC" % temp)
  
              self._pipe.send({'lux': lux, 'temp': temp})
  
              time.sleep(1)
  
  
  class Sensors(object):
      ''' Class for reading and reporting sensor values '''
      def __init__(self):
          self._child_pipe, self._pipe = multiprocessing.Pipe(duplex=True)
          self._helper = SensorsHelper(self._child_pipe)
          self._readings = None
  
      def begin(self):
          self._p = multiprocessing.Process(target=self._helper.sensors_thread)
          self._p.start()
          atexit.register(self.end)
  
      def end(self):
          self._pipe.send('end')
          self._p.join()
  
      def get_latest(self):
          while self._pipe.poll():
              self._readings = self._pipe.recv()
          return self._readings
  
subject: Fix dumb typo.