使用python来处理图片是非常方便的，下面提供一小段python处理图片的代码，需要安装图像处理工具包PIL(Python Image Library)。

#coding=utf-8
import Image
import urllib2
import StringIO
import os
#改变图片大小
def resize_img(img_path):
 try:
 img = Image.open(img_path)
 (width,height) = img.size
 new_width = 200
 new_height = height * new_width / width
 out = img.resize((new_width,new_height),Image.ANTIALIAS)
 ext = os.path.splitext(img_path)[1]
 new_file_name = '%s%s' %('small',ext)
 out.save(new_file_name,quality=95)
 except Exception,e:
 print e
#改变图片类型
def change_img_type(img_path):
 try:
 img = Image.open(img_path)
 img.save('new_type.png')
 except Exception,e:
 print e
#处理远程图片
def handle_remote_img(img_url):
 try:
 request = urllib2.Request(img_url)
 img_data = urllib2.urlopen(request).read()
 img_buffer = StringIO.StringIO(img_data)
 img = Image.open(img_buffer)
 img.save('remote.jpg')
 (width,height) = img.size
 out = img.resize((200,height * 200 / width),Image.ANTIALIAS)
 out.save('remote_small.jpg')
 except Exception,e:
 print e
if __name__ == '__main__':
 img_path = 'test.jpg'
 resize_img(img_path)
 change_img_type(img_path)
 img_url = 'http://img.hb.aicdn.com/042f8a4a70239f724ff7b9fa0fc8edf18658f41022ada-WcItWE_fw554'
 handle_remote_img(img_url)

可能会遇到的问题

ImportError: No module named Image

解决办法：安装Python Imaging Library(PIL)
代码如下:

— ZLIB (PNG/ZIP) support not available

— FREETYPE2 support not available

操作jpeg图片和png图片出现：

IOError: decoder jpeg not available 和 IOError: encoder zip not available

解决办法：
(1) 删除已经安装的PIL
代码如下:

— JPEG support available
— ZLIB (PNG/ZIP) support available
— FREETYPE2 support available

现在试试，已经ok了

希望本文所述对大家的Python程序设计有所帮助。