使用python制作验证码

方法一

简单型:使用random模块制作一个随机字母与数字的验证码

import random

def make_code(n):
    res=''
    for i in range(n):
        num=str(random.randint(1,9))#随机选取1到9的一个整数
        letter=chr(random.randint(65,90))#随机选大写英文的一个字母
        group=random.choice([num,letter])#随机选取整数还是大写字母
        res+=group#循环次数加到空字符串中
    return res

print(make_code(4))

方法二

进阶型:使用random和pillow模块制作图形验证码

pillow不是自带库,需要自行安装,pip install pillow

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

def get_valid_code():

    # 随机字母数字:
    def rndChar():
        char_num = random.randint(0, 9)
        char_upper=chr(random.randint(65, 90))
        char_lower=chr(random.randint(97, 122))
        char_str=str(random.choice([char_num,char_lower,char_upper]))
        return char_str

    # 随机颜色1:
    def rndColor():
        return (random.randint(64, 255), random.randint(64, 255), random.randint(64, 255))

    # 随机颜色2:
    def rndColor2():
        return (random.randint(32, 127), random.randint(32, 127), random.randint(32, 127))

    # 240 x 60:
    width = 60 * 5
    height = 60
    image = Image.new('RGB', (width, height), (0,0,0))
    # 创建Font对象:

    font = ImageFont.truetype(r'staticfontcalligraph421-bt-roman.woff.ttf', 40)
    # 创建Draw对象:
    draw = ImageDraw.Draw(image)
    # 填充每个像素(画点):
    for x in range(width):
        for y in range(height):
            draw.point((x, y), fill=rndColor())

    # 输出文字:
    random_code=''
    for t in range(5):
        char_str=rndChar()
        draw.text((60 * t + 10, 5), char_str, font=font, fill=rndColor2())
        random_code+=char_str

    # 模糊处理:
    image = image.filter(ImageFilter.SMOOTH)

    # 其他一些画图功能
    # 画线
    # draw.line()

    # 保存到内存中
    f=BytesIO()
    image.save(f,'jpeg')
    data=f.getvalue()
    return data

res=get_valid_code()
print(res)