基于Python批量生成指定尺寸缩略图代码实例

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


def make_thumb(url, sizes=(300, 175)):
"""
生成指定尺寸缩略图
:param path: 图像路径
:param sizes: 指定尺寸
:return: 无返回，直接保存图片
"""
response = req.get(path)
im = Image.open(BytesIO(response.content))
mode = im.mode
if mode not in ('L', 'RGB'):
if mode == 'RGBA':
# 透明图片需要加白色底
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')

# 切成方图，避免变形
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)
#保存图片
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)