Python 21 Django 实用小案例1

实用案例

     验证码与验证

 　 KindEditor

     组合搜索的实现

 　 单例模式

     beautifulsoup4

     

验证码与验证

需要安装Pillow模块

pip stall pillow

1、首先需要借助pillow模块用来画一个验证码图形，这里单独封装了一个py文件，调用一个方法就好了

 1 #!/user/bin/env python
 2 # -*-coding: utf-8-*-
 3 import random
 4 from PIL import ImageDraw,ImageFont,Image,ImageFilter
 5 
 6 
 7 def random_check_code(width=120, height=30, char_length=5, font_file='wryh.ttf', font_size=28):
 8     code = []
 9     img = Image.new(mode='RGB', size=(width, height), color=(255, 255, 255))
10     draw = ImageDraw.Draw(img, mode='RGB')
11 
12     def rndChar():
13         """
14         生成随机字母
15         :return:
16         """
17         return chr(random.randint(65, 90))
18 
19     def rndColor():
20         """
21         生成随机颜色
22         :return:
23         """
24         return (random.randint(0, 255), random.randint(10, 255), random.randint(64, 255))
25 
26     # 写文字
27     font = ImageFont.truetype(font_file, font_size)
28     for i in range(char_length):
29         char = rndChar()
30         code.append(char)
31         h = random.randint(0, 4)
32         draw.text([i * width / char_length, h], char, font=font, fill=rndColor())
33 
34     # 写干扰点
35     for i in range(40):
36         draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())
37 
38     # 写干扰圆圈
39     for i in range(40):
40         draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())
41         x = random.randint(0, width)
42         y = random.randint(0, height)
43         draw.arc((x, y, x + 4, y + 4), 0, 90, fill=rndColor())
44 
45     # 画干扰线
46     for i in range(5):
47         x1 = random.randint(0, width)
48         y1 = random.randint(0, height)
49         x2 = random.randint(0, width)
50         y2 = random.randint(0, height)
51         draw.line((x1, y1, x2, y2), fill=rndColor())
52 
53     img = img.filter(ImageFilter.EDGE_ENHANCE_MORE) #加滤镜，可以增加颜色的不同
54     return img, ''.join(code)

生成随机验证码