Recently, our shopping mall has been more and more widely used. But in the process of application upload, there is a problem: each application on the shelf needs to be configured with an application cover image, and the size of the cover image has a specified range of 300 * 175. And the size of the picture we make is usually larger than that. So every time I manually adjust the size, I have the idea of laziness. If I have the idea, I will start to act.

import requests as req
from PIL import Image
from io import BytesIO


def make_thumb(url, sizes=(300, 175)):
    """
    //Generate thumbnail of specified size
    :param path: Image path
    :param sizes: Specified size
    :return: No return, save the picture directly
    """
    response = req.get(path)
    im = Image.open(BytesIO(response.content))
    mode = im.mode
    if mode not in ('L', 'RGB'):
        if mode == 'RGBA':
            # Transparent pictures need white background
            alpha = im.split()[3]
            bgmask = alpha.point(lambda x: 255 - x)
            im = im.convert('RGB')
            im.paste((255, 255, 255), None, bgmask)
        else:
            im = im.convert('RGB')

    # Cut into squares to avoid deformation
    width, height = im.size
    if width == height:
        region = im
    else:
        if width > height:
            # h*h
            delta = (width - height) / 2
            box = (delta, 0, delta + height, height)
        else:
            # w*w
            delta = (height - width) / 2
            box = (0, delta, width, delta + width)
        region = im.crop(box)

    # resize
    thumb = region.resize((sizes[0], sizes[1]), Image.ANTIALIAS)
    #Save pictures
    filename = url.split('/')[-1]
    name, ext = filename.split('.')
    savename = name + str(sizes[0]) + '_' + str(sizes[1]) + '.' + ext
    thumb.save(savename, quality=100)


path = r'C:\Users\HP\Desktop\luckylttory.png'
make_thumb(path)

Results:
Original image:

Results:

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