<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def make_img_widget(cls, img, layout=Layout(), format='jpg'):
        "Returns an image widget for specified file name `img`."
        return widgets.Image(value=img, format=format, layout=layout)