Detailed explanation of how Python generates QR codes from text

This article mainly introduces the method of generating QR codes from text in Python. It analyzes the specific steps and related implementation techniques of Python to generate QR codes in the form of a complete example. Friends in need can refer to the following

The example of this article describes the method of generating QR code from text in Python. Share it with everyone for your reference, the details are as follows:

#coding:utf-8
'''
Python生成二维码 v1.0
主要将文本生成二维码图片
测试一：将文本生成白底黑字的二维码图片
测试二：将文本生成带logo的二维码图片
'''
__author__ = 'Xue'
import qrcode
from PIL import Image
import os
#生成二维码图片
def make_qr(str,save):
  qr=qrcode.QRCode(
    version=4, #生成二维码尺寸的大小 1-40 1:21*21（21+(n-1)*4）
    error_correction=qrcode.constants.ERROR_CORRECT_M, #L:7% M:15% Q:25% H:30%
    box_size=10, #每个格子的像素大小
    border=2, #边框的格子宽度大小
  )
  qr.add_data(str)
  qr.make(fit=True)
  img=qr.make_image()
  img.save(save)
#生成带logo的二维码图片
def make_logo_qr(str,logo,save):
  #参数配置
  qr=qrcode.QRCode(
    version=4,
    error_correction=qrcode.constants.ERROR_CORRECT_Q,
    box_size=8,
    border=2
  )
  #添加转换内容
  qr.add_data(str)
  #
  qr.make(fit=True)
  #生成二维码
  img=qr.make_image()
  #
  img=img.convert("RGBA")
  #添加logo
  if logo and os.path.exists(logo):
    icon=Image.open(logo)
    #获取二维码图片的大小
    img_w,img_h=img.size
    factor=4
    size_w=int(img_w/factor)
    size_h=int(img_h/factor)
    #logo图片的大小不能超过二维码图片的1/4
    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)
    #计算logo在二维码图中的位置
    w=int((img_w-icon_w)/2)
    h=int((img_h-icon_h)/2)
    icon=icon.convert("RGBA")
    img.paste(icon,(w,h),icon)
  #保存处理后图片
  img.save(save)
if __name__=='__main__':
  save_path='theqrcode.png' #生成后的保存文件
  logo='logo.jpg' #logo图片
  str=raw_input('请输入要生成二维码的文本内容：')
  #make_qr(str)
  make_logo_qr(str,logo,save_path)

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