python学习之使用PIL模块制作随机验证码

制作随机验证码，需要如下知识点：

1、随机验证码的制作（这里用的是random模块随机产生字符）

2、图片的制作

3、随机直线干扰项

4、其他随机干扰项

代码如下：

from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
import random

#随机颜色
def get_random_color():
    r = random.randint(0,255)
    g = random.randint(0,255)
    b = random.randint(0,255)
    return (r,g,b)

#随机位置
def get_random_position(x,y):
    x = random.randint(0,x - 50)
    y = random.randint(0,y - 15)
    return (x,y)

#线条随机俩个坐标
def get_random_line_position(x,y):
    x1 = random.randint(0,x)
    y1 = random.randint(0,y)
    x2 = random.randint(0,x)
    y2 = random.randint(0,y)
    return (x1,y1,x2,y2)

def get_random_eci_position(x,y):
    x1 = random.randint(0,x)
    y1 = random.randint(0,y)
    x2 = x1 + 4
    y2 = y1 + 4
    return (x1,y1,x2,y2)

#随机字符
def get_random_str():
    num = str(random.randint(0,9))
    low_letter = chr(random.randint(97,122))
    upper_letter = chr(random.randint(65,90))
    #print(num,low_letter,upper_letter)
    randomStr = random.choice([num,low_letter,upper_letter])
    return randomStr

x = 200
y = 60
#创建一个随机颜色的图形
img = Image.new('RGB',(x,y),get_random_color())

#在图形上随机位置显示4个随机颜色的文字
draw = ImageDraw.Draw(img)
font = ImageFont.truetype('segoeuib.ttf',20)
randomStr = ''
for i in range(4):
    v = get_random_str()
    randomStr += v
#print(randomStr)
draw.text(get_random_position(x,y),randomStr,get_random_color(),font = font)

#在图形上随机位置显示随机颜色的直线
for i in range(8):
    draw.line(get_random_line_position(x,y),get_random_color())
    draw.ellipse(get_random_eci_position(x,y),get_random_color())
    draw.arc(get_random_line_position(x,y),0,90,get_random_color())

img.show()

执行效果如下：