image resizing using PythonImagingLibrary(PIL)

gistfile1.py

class resize:
    def __init__(self, input_image):
        self.input_image = input_image
        self.output_image = StringIO()

    def resize_image(self, width=400, height=300, aspecto_width=4, aspect_height=3):
          """
         resize image
         :param self
         :param width default=200px
         :param height default=150px
        """
        # im memory instance
        if not self.input_image:
            return None

        im = Image.open(StringIO(self.input_image.getvalue()))
        w, h = im.size
        print w
        print h
        left = 0
        right = w
        a = h - ((aspect_height * float(w)) / aspecto_width)
        top = int(a / 2)
        print top
        bottom = h - top
        print bottom

        if im.mode != 'RGB':
            im.convert('RGB')
        cropped = im.crop((left, top, right, bottom))
        cropped.thumbnail((width, height), Image.ANTIALIAS)
        cropped.save(self.image_43, quality=85, format='JPEG')



util_image = resize(input_image=dest_file)
util_image.resize_image()

save_file = util.image

new_instance.image1.save(save_file_name, ContentFile(util_image.resize_image.getvalue()))
path = new_instance.image1.name

util_image.resize_image.truncate(0)
dest_file.close()