new_contents: import os, sigar;
  
  sg = sigar.open()
  mem = sg.mem()
  swap = sg.swap()
  sg.close()
  
  print "\tTotal\tUsed\tFree"
  
  print "Mem:\t",\
      (mem.total() / 1024), \
      (mem.used() / 1024), \
      (mem.free() / 1024)
  
  print "Swap:\t", \
      (swap.total() / 1024), \
      (swap.used() / 1024), \
      (swap.free() / 1024)
  
  print "RAM:\t", mem.ram(), "MB"
  
  
subject: add free example