Modify picture resolution

There are often daily website called for the resolution of the image upload, every time I see online tutorial is by means of ps, Mito Xiu Xiu toss. Feeling too toss. With python to write a little code conversion accuracy to meet the daily needs.

from PIL import Image

def change_resolution(picPath, reslution):
    img = Image.open(picPath)
    x, y = img.size
    print( x, y)
    changex = float(x) / reslution[0]
    changey = float(y) / reslution[1]

    # 判断分辨率是否满足
    if changex > 1 or changey > 1:

        change = changex if changex > changey else changey
        #print( change)
        #print( int(reslution[0] / change), int(reslution[1] / change))
        print('output reslution:')
        print( int(x / change), int(y / change))
        img.resize((int(x / change), int(y / change))).save('result.jpg')

if __name__ == '__main__':
    change_resolution('20190123154207.jpg', (1136, 640))

The following are the comparison of before and after pictures of the conversion.