def __init__(self):
self.read_format = None
self.write_format = None
self.img = null_image()
def __init__(self):
self.read_format = None
self.write_format = None
self.img = null_image()
def __init__(self):
self.read_format = None
self.write_format = None
self.img = null_image()
def __init__(self):
self.read_format = None
self.write_format = None
self.img = null_image()