def __init__(self, hw='', img_src='', img_attrib=''):
    super().__init__()
    self.hw = hw
    self.img_src = img_src
    self.img_attrib = img_attrib
def __init__(self, hw=, img_src=, img_attrib=):
    super().__init__()
    self.hw = hw
    self.img_src = img_src
    self.img_attrib = img_attrib