python生成字母验证图片

from PILimport Image, ImageDraw, ImageFont
import random

def generate_authenticode():
    letters = random.sample('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789',4)
    width = 100
    height = 40
    im = Image.new("RGB", (width, height), (255,255,255))
    dr = ImageDraw.Draw(im)
    font = ImageFont.truetype("/Library/Fonts/arial.ttf",30)
   
    for iin range(4):
        dr.text((5+i*20,5), letters[i], (random.randint(,255), random.randint(,255), random.randint(,255)), font)
    del dr

for xin range(width):
    for yin range(height):
        if im.getpixel((x, y)) == (255,255,255):
            im.putpixel((x, y), (random.randint(,255), random.randint(,255), random.randint(,255)))

im.save('result.png')

if __name__ =="__main__":

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