import commands
import popen2


print(commands.getstatusoutput('echo / | xargs ls'))
print(commands.getoutput('echo / | xargs ls'))

# This one is safe.
print(commands.getstatus('echo / | xargs ls'))

print(popen2.popen2('echo / | xargs ls')[0].read())
print(popen2.popen3('echo / | xargs ls')[0].read())
print(popen2.popen4('echo / | xargs ls')[0].read())
print(popen2.Popen3('echo / | xargs ls').fromchild.read())
print(popen2.Popen4('echo / | xargs ls').fromchild.read())
