python给图片右上角加上红色的数字详解编程语言

from PIL import Image,ImageDraw,ImageFont 
 
def addNum(filePath): 
    img = Image.open(filePath) 
    size = img.size 
    fontSize = size[1] / 4 
    draw = ImageDraw.Draw(img) 
    
    ttFont = ImageFont.truetype("/Library/Fonts/arial.ttf", fontSize) 
    draw.text((size[0]-fontSize, 0), "3",(256,0,0), font=ttFont) 
    del draw 
    img.save('./result.jpg') 
    img.show() 
 
print addNum("image.jpg")