Python使用PIL模块生成随机验证码

PIL模块的安装

pip3 install pillow

生成随机验证码图片

import random
from PIL import Image, ImageDraw, ImageFont
from io import BytesIO


def random_str():
    '''
    生成随机字符
    :return:随机字符
    '''
    random_int = str(random.randint(0,9))
    random_up = chr(random.randint(65,90))
    random_down = chr(random.randint(97,122))
    retu_str = random.choice([random_int,random_up,random_down])
    return retu_str

def rndColor():
    '''
    生成随机颜色
    :return: 随机rbg颜色
    '''
    return (random.randint(0, 255), random.randint(10, 255), random.randint(64, 255))
def get_verify_code_img(filename):
    '''
    生成随机验证码图片，保存到内存，通过HttpResponse发送到前端
    :param request: 生成session
    :return:  内存中的图片
    '''

    # 创建图片与画笔
    img = Image.new(mode='RGB',size=(186,34),color=rndColor())
    draw = ImageDraw.Draw(img)
    verify = ''

    # 字体样式
    font = ImageFont.truetype(font='font1.ttf',size=20)

    #生成六位数验证码
    for i in range(6):
        char = random_str()
        verify += char
        draw.text([i*20+50,5],char,font=font,fill=rndColor())

    f = open(filename','wb')
    img.save(f,'png')

还可以给图片验证码添加燥点与燥线

将下面代码添加到get_verify_code_img中

    # width=270
    # height=40
    # for i in range(10):
    #     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())
    #
    # 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())

调用

get_verify_code_img('验证码.png')