python基于qrcode和Pillow二维码生成

因为项目需要，通过python的qrcode和Pillow库实现生成二维码。

• 开发环境：

  • python 3.6.3
  • Pillow 4.3.0
  • qrcode 5.3

• 开发步骤：

  1. 安装python 3.6.3 此处不做详述，明细见：https://www.cnblogs.com/tiandlsd001/p/7764044.html

  2. 安装以上列举依赖库
     pip install xxx

• 代码参考：

# coding:utf-8
import qrcode
from PIL import Image
from django.conf import settings

from common import constant
from common.utils.utils_file import FileOperateUtil
from common.utils.utils_qraphics import GraphicsUtil


class QRCodeUtil(object):
    @staticmethod
    def create_qrcode(url, local_folder, local_file_name, qr_width=1280, qr_height=1280):
        """
        生成二维码
        :param url:              二维码对应链接地址
        :param local_folder:     二维码存放目录
        :param local_file_name:  二维码文件名
        :param qr_width:         宽度
        :param qr_height:        高度
        :return:
        """
        qr = qrcode.QRCode(
            version=1,
            # 设置容错率为最高
            error_correction=qrcode.ERROR_CORRECT_H,
            box_size=10,
            border=4,
        )
        qr.add_data(url)
        qr.make(fit=True)

        img = qr.make_image()
        # 设置二维码为彩色
        img = img.convert("RGBA")
        icon = Image.open(constant.APP_WEB_LOGO)
        w, h = img.size
        factor = 4
        size_w = int(w / factor)
        size_h = int(h / factor)
        icon_w, icon_h = icon.size
        if icon_w > size_w:
            icon_w = size_w
        if icon_h > size_h:
            icon_h = size_h
        icon = icon.resize((icon_w, icon_h), Image.ANTIALIAS)
        w = int((w - icon_w) / 2)
        h = int((h - icon_h) / 2)
        icon = icon.convert("RGBA")
        newimg = Image.new("RGBA", (icon_w + 8, icon_h + 8), (255, 255, 255))
        img.paste(newimg, (w - 4, h - 4), newimg)

        img.paste(icon, (w, h), icon)
        real_file_folder = "%s/%s" % (settings.MEDIA_ROOT, local_folder)
        FileOperateUtil.validate_folder_exists(real_file_folder, is_create=True)
        real_file_path = "%s/%s" % (real_file_folder, local_file_name)
        img.save(real_file_path, quality=100)
        # 将图片放大到1280x1280
        GraphicsUtil.fixed_size(real_file_path, real_file_path, qr_width, qr_height)

代码中有部分自定义常量，使用时自行修改即可...不完善之处，见谅！！！