Python3 Pillow Generate Verification Code picture method Introduction

This article mainly introduces the Python3 pillow to generate a simple verification code picture example, very practical value, the need for friends can refer to the following

Randomly generate a captcha picture using the Python Pillow Module random module and apply it to the Django project

Installing Pillow

$ PIP3 Install Pillow

Generate a Captcha picture

\vericode.pyfrom PIL Import image,imagedraw,imagefont,imagefilterimport random #随机码 default length =1def random_code (lenght=1):    code = "for  char in range (lenght):    code + = Chr (Random.randint (65,90))  return code #随机颜色 default color range" 1,255 " def random_color (s=1,e=255):  return (Random.randint (s,e), Random.randint (S,e), Random.randint (s,e)) #生成验证码图片 # Length captcha #width picture width #height picture height #返回验证码和图片def veri_code (lenght=4,width=160,height=40):  #创建Image对象  image = Image.new (' RGB ', (width,height), (255,255,255))  #创建Font对象  font = imagefont.truetype (' Arial.ttf ', +)  # Create Draw object  draw = Imagedraw.draw (image)  #随机颜色填充每个像素 for  x in range (width): A for    y in range (height): C14/>draw.point ((x, y), Fill=random_color (64,255))  #验证码  code = Random_code (lenght)  #随机颜色验证码写到图片上  for T in range (lenght):    draw.text ((40*t+5,5), Code[t],font=font,fill=random_color (32,127))  #模糊滤镜  image = Image.filter (Imagefilter.blur)  return code,image

Application

Write a view function under a Django application

\views.pyfrom. Import vericode.pyfrom IO import bytesiofrom django.http import httpresponsedef verify_code (Request):  f = Bytesio () C1/>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 ')

The Django session is used here to add ' django.contrib.sessions ' to the Installed_apps of the Django settings.py (added by default)
The Verify_code view function adds the verification code to the session and the CAPTCHA image to the browser, and when the form is submitted to submit_xxx (), the verification code is obtained from the session, and then the verification code entered from the form is compared.

Here is simply a description of the URL configuration and the front-end code is not given.