old_contents: #!/usr/bin/env python
  
  import os
  import sys
  
  from coverage import coverage
  
  from circuits import Component
  from circuits.app import Daemon
  
  class App(Component):
  
      def __init__(self, pidfile, signalfile):
          super(App, self).__init__()
  
          self.pidfile = pidfile
          self.signalfile = signalfile
  
          Daemon(self.pidfile).register(self)
  
      def signal(self, signal, stack):
          f = open(self.signalfile, "w")
          f.write(str(signal))
          f.close()
  
  def main():
      _coverage = coverage(data_suffix=True)
      _coverage.start()
  
      pidfile = os.path.abspath(sys.argv[1])
      signalfile = os.path.abspath(sys.argv[2])
      App(pidfile, signalfile).run()
  
      _coverage.stop()
      _coverage.save()
  
  if __name__ == "__main__":
      main()
  
new_contents: #!/usr/bin/env python
  
  import os
  import sys
  
  try:
      from coverage import coverage
      HAS_COVERAGE = True
  except ImportError:
      HAS_COVERAGE = False
  
  from circuits import Component
  from circuits.app import Daemon
  
  class App(Component):
  
      def __init__(self, pidfile, signalfile):
          super(App, self).__init__()
  
          self.pidfile = pidfile
          self.signalfile = signalfile
  
          Daemon(self.pidfile).register(self)
  
      def signal(self, signal, stack):
          f = open(self.signalfile, "w")
          f.write(str(signal))
          f.close()
  
  def main():
      if HAS_COVERAGE:
          _coverage = coverage(data_suffix=True)
          _coverage.start()
  
      pidfile = os.path.abspath(sys.argv[1])
      signalfile = os.path.abspath(sys.argv[2])
      App(pidfile, signalfile).run()
  
      if HAS_COVERAGE:
          _coverage.stop()
          _coverage.save()
  
  if __name__ == "__main__":
      main()
  
subject: make coverage optional