code: def get_programs():
      
      programs = []
      os.environ['PATH'] += os.pathsep + os.getcwd()
      for p in os.environ['PATH'].split(os.pathsep):
          if path.isdir(p):
              for f in os.listdir(p):
                  if _is_executable(path.join(p, f)):
                      yield f
docs: Returns a generator that yields the available executable programs
  
      :returns: a generator that yields the programs available after a refresh_listing()
      :rtype: generator