Python怎么改图片大小

import Image

infile = 'D:\\original_img.jpg'

outfile = 'D:\\adjust_img.jpg'

im = Image.open(infile)

(x,y) = im.size #read image size

x_s = 250 #define standard width

y_s = y * x_s / x #calc height based on standard width

out = im.resize((x_s,y_s),Image.ANTIALIAS) #resize image with high-quality

out.save(outfile)

print 'original size: ',x,y

print 'adjust size: ',x_s,y_s

'''

OUTPUT:

original size:  500 358

adjust size:  250 179

'''