python实现生成验证码功能

首先我们需要使用到 Pillow 包

pip install Pillow -i https://pypi.douban.com/simple/

标题代码实现实例

# -*- coding:utf-8 -*-
# @Author : 小福不认命
import os
from PIL import Image, ImageDraw, ImageFont, ImageFilter
import random
import string
from system_manage.settings import *


def random_str(length=4):
    """ 随机字符串 默认长度 4

    :param length: 默认长度 4
    :return:
    """
    return ''.join(random.sample(string.ascii_letters, length))


def random_color(s=1, e=255):
    """ 随机 RGB 颜色

    :param s:  起始值, 0-255
    :param e:  结束时, 0-255
    :return:  (r, g, b)
    """
    return random.randint(s, e), random.randint(s, e), random.randint(s, e)


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


def veri_code(length=4, width=100, height=42, size=30):
    """ 生成验证码图片
    :param length:  验证码字符串长度
    :param width:  图片宽度
    :param height:  图片高度
    :param size:  字体大小
    :return:  (验证码图片, 验证码字符串)
    """
    # 创建Image对象
    image = Image.new('RGB', (width, height), (255, 255, 255))
    font_path = os.path.join(str(BASE_DIR), r'font_file/arial.ttf')
    # 创建Font对象
    font = ImageFont.truetype(font=font_path, size=size)  # size 字体大小
    # 创建Draw对象
    draw = ImageDraw.Draw(image)
    # 随机颜色填充每个像素
    for w in range(0, width, int(width / 8)):
        fill = get_rdmcolor()
        x1 = random.randint(0, width)
        y1 = random.randint(0, height)
        x2 = random.randint(0, width)
        y2 = random.randint(0, height)
        draw.line((x1, y1, x2, y2), fill=fill, width=2)
    # 验证码
    code = random_str(length)
    # 随机颜色验证码写到图片上
    for t in range(length):
        draw.text((25 * t + 5, 5), code[t], font=font, fill=random_color(32, 127))
    # 模糊滤镜
    # image = image.filter(ImageFilter.BLUR)
    return image, code


if __name__ == '__main__':
    img, code = veri_code()
    with open('test.png', 'wb') as f:
        img.save(f)

实现效果