def __str__(self):
    return '[{name}] ({location} - {date}) : {image_nb} images, {size}, sensor : {sensor}, id : {id}'.format(name=self.name, location=self.location, date=self.date_str, image_nb=self.image_nb, size=self.size, sensor=self.sensor, id=self.id)
def __str__(self):
    return '[{name}] ({location} - {date}) : {image_nb} images, {size}, sensor : {sensor}, id : {id}'.format(name=self.name, location=self.location, date=self.date_str, image_nb=self.image_nb, size=self.size, sensor=self.sensor, id=self.id)