需要安装第三方模块pillow

import random

from PIL import Image, ImageDraw, ImageFont

步骤一：编写一个生成随机颜色的函数

def get_random_color():
    return random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)

步骤二：在面板里放入随机字符

width = 350
height = 38
img = Image.new("RGB", (width, height), get_random_color())
# 画一个随机颜色的面板
draw = ImageDraw.Draw(img)
font = ImageFont.truetype("kumo.ttf", 32)
for i in range(6):
    random_num = str(random.randint(0, 9))
    random_low_alphabet = chr(random.randint(97, 122))
    random_upper_alphabet = chr(random.randint(65, 90))
    random_char = random.choice([random_num, random_low_alphabet, random_upper_alphabet])
    # 在面板里画随机颜色的随机字符
    draw.text((i * 30 + 55, 0), random_char, get_random_color(), font=font)

kumo.ttf是文字模型，可以从网上下载，博客上好像上传不了呀，无法分享出来了！！！！

步骤三：在面板上画随机线

for i in range(3):
    x1 = random.randint(0, width)
    x2 = random.randint(0, width)
    y1 = random.randint(0, height)
    y2 = random.randint(0, height)
    draw.line((x1, y1, x2, y2), fill=get_random_color())

步骤四：在面板上画圆点

for i in range(100):
   draw.point([random.randint(0, width), random.randint(0, height)], fill=get_random_color())
   x = random.randint(0, width)
   y = random.randint(0, height)
   draw.arc((x, y, x + 4, y + 4), 0, 90, fill=get_random_color())

步骤五：将登录验证吗保存到本地文件

# 写与读
f = open("valid.jpg", "wb")
img.save(f, "png")

最后是生成下面图片中的样子

结尾附上完整代码

import random

from PIL import Image, ImageDraw, ImageFont


def get_valid_img():
    def get_random_color():
        return random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)

    # 在面板里放入随机字符
    width = 350
    height = 38
    img = Image.new("RGB", (width, height), get_random_color())
    # 画一个随机颜色的面板
    draw = ImageDraw.Draw(img)
    font = ImageFont.truetype("kumo.ttf", 32)

    for i in range(6):
        random_num = str(random.randint(0, 9))
        random_low_alphabet = chr(random.randint(97, 122))
        random_upper_alphabet = chr(random.randint(65, 90))
        random_char = random.choice([random_num, random_low_alphabet, random_upper_alphabet])
        draw.text((i * 30 + 55, 0), random_char, get_random_color(), font=font)

    # 在面板上画随机线
    for i in range(3):
        x1 = random.randint(0, width)
        x2 = random.randint(0, width)
        y1 = random.randint(0, height)
        y2 = random.randint(0, height)
        draw.line((x1, y1, x2, y2), fill=get_random_color())

    # 在面板上画圆点
    for i in range(100):
        draw.point([random.randint(0, width), random.randint(0, height)], fill=get_random_color())
        x = random.randint(0, width)
        y = random.randint(0, height)
        draw.arc((x, y, x + 4, y + 4), 0, 90, fill=get_random_color())

    # 写与读
    f = open("valid.jpg", "wb")
    img.save(f, "png")


if __name__ == '__main__':
    get_valid_img()