import os
import subprocess
import sys

def launch(program):
  """launch(program) 
    Run program as if it had been double-clicked in Finder, Explorer,
    Nautilus, etc. On OS X, the program should be a .app bundle, not a
    UNIX executable. When used with a URL, a non-executable file, etc.,
    the behavior is implementation-defined.
    
    Returns something false (0 or None) on success; returns something
    True (e.g., an error code from open or xdg-open) or throws on failure.
    However, note that in some cases the command may succeed without
    actually launching the targeted program."""
  if sys.platform == 'darwin':
    ret = subprocess.call(['open', program])
  elif sys.platform.startswith('win'):
    ret = os.startfile(os.path.normpath(program))
  else:
    ret = subprocess.call(['xdg-open', program])
  return ret