python 图片压缩

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

''' pip install pillow ''' from io import BytesIO   from PIL import Image     def pic_compress(pic_path, out_path, target_size, quality=90, step=5):     # 读取图片bytes     with open(pic_path, 'rb') as f:         pic_byte = f.read()       current_size = len(pic_byte) / 1024  # 图片当前质量大小     print("图片压缩前的大小为(KB)：", current_size)     while current_size > target_size:  # 当达到目标压缩大小后退出循环         img = Image.open(BytesIO(pic_byte))         buf = BytesIO()         img.save(buf, format=img.format, quality=quality)         pic_byte = buf.getvalue()         if quality - step < 0:  # 以降低到最小质量             break         quality -= step         current_size = len(pic_byte) / 1024       # 保存图片     with open(out_path, 'wb') as f:         f.write(pic_byte)       return len(pic_byte) / 1024     def main():     pic_size = pic_compress('zy.jpg', 'new_zy.jpg', target_size=100)     print("图片压缩后的大小为(KB)：", pic_size)   if __name__ == '__main__':     main()