$ pip3 install pillow

\vericode.py

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

 #隨機碼 默認長度=1
def random_code(lenght=1):  
  code = ''
  for char in range(lenght):
    code += chr(random.randint(65,90))
  return code

 #隨機顏色 默認顏色范圍【1，255】
def random_color(s=1,e=255):
  return (random.randint(s,e),random.randint(s,e),random.randint(s,e))

 #生成驗證碼圖片
 #length 驗證碼長度
 #width 圖片寬度
 #height 圖片高度
 #返回驗證碼和圖片
def veri_code(lenght=4,width=160,height=40):
  #創(chuàng)建Image對象
  image = Image.new('RGB',(width,height),(255,255,255))
  #創(chuàng)建Font對象
  font = ImageFont.truetype('Arial.ttf',32)
  #創(chuàng)建Draw對象
  draw = ImageDraw.Draw(image)
  #隨機顏色填充每個像素
  for x in range(width):
    for y in range(height):
      draw.point((x,y),fill=random_color(64,255))
  #驗證碼
  code = random_code(lenght)
  #隨機顏色驗證碼寫到圖片上
  for t in range(lenght):
    draw.text((40*t+5,5),code[t],font=font,fill=random_color(32,127))
  #模糊濾鏡
  image = image.filter(ImageFilter.BLUR)
  return code,image

\views.py

from . import vericode.py
from io import BytesIO
from django.http import HttpResponse

def verify_code(request):
  f = BytesIO()
  code,image = vericode.veri_code()
  image.save(f,'jpeg')
  request.session['vericode'] = code
  return HttpResponse(f.getvalue())

def submit_xxx(request):
  if request.method == "POST":
    vericode = request.session.get("vericode").upper()
    submitcode = request.POST.get("vericode").upper()
    if submitcode == vericode:
      return HttpResponse('ok')
  return HttpResponse('error')