def preinit():
 global _initialized
 if (_initialized >= 1):
  return
 try:
  from . import BmpImagePlugin
 except ImportError:
  pass
 try:
  from . import GifImagePlugin
 except ImportError:
  pass
 try:
  from . import JpegImagePlugin
 except ImportError:
  pass
 try:
  from . import PpmImagePlugin
 except ImportError:
  pass
 try:
  from . import PngImagePlugin
 except ImportError:
  pass
 _initialized = 1

def preinit ( ) : global _initialized if ( _initialized >= 1 ) : return try : from . import BmpImagePlugin except ImportError : pass try : from . import GifImagePlugin except ImportError : pass try : from . import JpegImagePlugin except ImportError : pass try : from . import PpmImagePlugin except ImportError : pass try : from . import PngImagePlugin except ImportError : pass _initialized = 1
explicitly load standard file format drivers .