content: import commands
  import popen2
  
  
  print(commands.getstatusoutput('/bin/echo / | xargs ls'))
  print(commands.getoutput('/bin/echo / | xargs ls'))
  
  # This one is safe.
  print(commands.getstatus('/bin/echo / | xargs ls'))
  
  print(popen2.popen2('/bin/echo / | xargs ls')[0].read())
  print(popen2.popen3('/bin/echo / | xargs ls')[0].read())
  print(popen2.popen4('/bin/echo / | xargs ls')[0].read())
  print(popen2.Popen3('/bin/echo / | xargs ls').fromchild.read())
  print(popen2.Popen4('/bin/echo / | xargs ls').fromchild.read())
  