old_contents: # Licensed Materials - Property of IBM
  # Copyright IBM Corp. 2016
  
  from __future__ import print_function
  import sys
  from streamsx.topology.topology import Topology
  import streamsx.topology.context
  import echo_functions
  
  
  def main():
      """
      Sample echo topology application. This Python application builds a
      simple topology that echoes its command line arguments to standard output.
  
      The application implements the typical pattern
      of code that declares a topology followed by
      submission of the topology to a Streams context.
      
      Args:
          a list of values to print to stdout
          
      Example:
          python3 echo.py hello1 hello2 hello3
      Output:
          hello1
          hello2
          hello3
      """
      
      topo = Topology("echo")
      # The command line arguments (sys.argv) excluding the application
      # name will be used at runtime as the contents of the echo stream.
      echo = topo.source(sys.argv[1:])
      
      # print the echo stream to stdout
      echo.print()
      
      # At this point the topology is declared with a single
      # stream that is printed to stdout
      
      # execute the topology by submitting to a standalone context
      streamsx.topology.context.submit("STANDALONE", topo)
       
  if __name__ == '__main__':
      main()
      
  
new_contents: # Licensed Materials - Property of IBM
  # Copyright IBM Corp. 2016
  
  from __future__ import print_function
  import sys
  from streamsx.topology.topology import Topology
  import streamsx.topology.context
  
  
  def main():
      """
      Sample echo topology application. This Python application builds a
      simple topology that echoes its command line arguments to standard output.
  
      The application implements the typical pattern
      of code that declares a topology followed by
      submission of the topology to a Streams context.
      
      Args:
          a list of values to print to stdout
          
      Example:
          python3 echo.py hello1 hello2 hello3
      Output:
          hello1
          hello2
          hello3
      """
      
      topo = Topology("echo")
      # The command line arguments (sys.argv) excluding the application
      # name will be used at runtime as the contents of the echo stream.
      echo = topo.source(sys.argv[1:])
      
      # print the echo stream to stdout
      echo.print()
      
      # At this point the topology is declared with a single
      # stream that is printed to stdout
      
      # execute the topology by submitting to a standalone context
      streamsx.topology.context.submit("STANDALONE", topo)
       
  if __name__ == '__main__':
      main()
      
  
subject: correct samples/python/topology/simple/echo.py