CAPTCHA use Python library, two-dimensional code library

 

1. Graphics Library codes captcha

# Introducing graphics library

from captcha.image import ImageCaptcha

# Obtain an image object

image = ImageCaptcha(width=120, height=40, font_sizes=(30, 32, 36))

chars = "1234"

 

# Create a two-dimensional code objects

im = image.generate(chars)

 

# (1) direct values

img_val = im.getvalue()

 

# (2) Save the file

file_name = "1.png"

im.save(file_name)

 

2. The two-dimensional code library qrcode

import qrcode

import os

 

# Create a two-dimensional code image err_level 0-3 error in descending size of each pixel cell size

def make_qrcode(url="test", file_name="", size=8, err_level=0):

　　if err_level == 3:

　　　　 error_correction = qrcode.constants.ERROR_CORRECT_L

　　elif err_level == 2:

　　　　error_correction = qrcode.constants.ERROR_CORRECT_M

　　elif err_level == 1:

　　　　error_correction = qrcode.constants.ERROR_CORRECT_Q

　　else:

　　　　error_correction = qrcode.constants.ERROR_CORRECT_H

 

　　# Initialization code is a two-dimensional objects

　　qr = qrcode.QRCode(

            version=1,

            error_correction=error_correction,

            box_size=size,

            border=4,

        )

 

　　# Add To generate two-dimensional code connected

　　qr.add_data(url)

　　qr.make(fit=True)

　　file_content = file_name

　　# Set the fill color and background color

　　img = qr.make_image(fill_color="black", back_color="white")

 

　　# Do you want to save the file

　　if file_name and isinstance(file_name, str):

　　　　# save document

　　　　img.save(file_name)

　　else:

　　　　# Direct output

　　　　b = io.BytesIO()

　　　　img.save(b, "PNG")

　　　　file_content = b.getvalue()

            

　　return file_content

 

# Direct call to