本文实例为大家分享了python实现图片批量压缩程序的具体代码，供大家参考，具体内容如下

说明

• 运行环境：Win10 Pycharm
• 程序没有用到面向对象编程方法，只是简单的面向过程设计
• 用到的模块：PIL、os、sys
• 使用方法： 在Pycharm的terminal中输入”python xxx.py source_dir dest_dir”就可以把source_dir中的图片文件进行压缩并保存到dest_dir中
  

源码

from PIL import Imageimport osimport sys# 定义可以识别的图片文件类型，可以自行扩充valid_file_type = ['.jpg', '.png']# 定义压缩比，数值越大，压缩越小SIZE_normal = 1.0SIZE_small = 1.5SIZE_more_small = 2.0def make_directory(directory): """创建目录""" os.makedirs(directory)def directory_exists(directory): """判断目录是否存在""" if os.path.exists(directory): return True else: return Falsedef list_img_file(directory): """列出目录下所有文件，并筛选出图片文件列表返回""" old_list = os.listdir(directory) # print old_list new_list = [] for filename in old_list: if os.path.isfile(filename): f, e = os.path.splitext(filename) if e in valid_file_type: new_list.append(filename) else: pass else: pass # print new_list return new_listdef print_help(): print """ This program helps compress many image files you can choose which scale you want to compress your img(jpg/png/etc) 1) normal compress(4M to 1M around) 2) small compress(4M to 500K around) 3) smaller compress(4M to 300K around) """def compress(choose, des_dir, file_list): """压缩算法，img.thumbnail对图片进行压缩，还可以改变宽高数值进行压缩""" if choose == '1': scale = SIZE_normal if choose == '2': scale = SIZE_small if choose == '3': scale = SIZE_more_small for infile in file_list: img = Image.open(infile) # size_of_file = os.path.getsize(infile) w, h = img.size img.thumbnail((int(w/scale), int(h/scale))) img.save(des_dir + '/' + infile)if __name__ == "__main__": src_dir, des_dir = sys.argv[1], sys.argv[2] if directory_exists(src_dir): if not directory_exists(des_dir): make_directory(des_dir) # business logic file_list = list_img_file(src_dir) # print file_list if file_list: print_help() choose = raw_input("enter your choice:") compress(choose, des_dir, file_list) else: pass else: print "source directory not exist!"

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。