def get_hidden_field_id(self, name):
        i = name.rindex('_')
        return "id_%s_%d" % (name[:i], int(name[i + 1:]) + 1)
dataset/ETHPy150Open WGBH/django-versatileimagefield/versatileimagefield/widgets.py/ClearableFileInputWithImagePreview.get_hidden_field_id/original