文件操作，列表实例NiceHexSpiral

fr = open('ouou.txt',mode='r',encoding='utf-8')
plaincode = fr.read()
print('明文:' + plaincode)

import turtle
turtle.speed(10)
colors=['blue','purple','yellow','#9B30FF','orange','red']


for i in range(100):
    turtle.pencolor(colors[i%6])
    turtle.forward(i)
    turtle.left(59)
turtle.done()

　　

print('密文:',end='') for c in plaincode: print(chr(ord(c)+3),end='')

　　

fr = open('ouou.txt',mode='r',encoding='utf-8')
plaincode = fr.read()
fr.close


fw = open('c_ouou.txt',mode='a',encoding='utf-8')
for c in plaincode:
    fw.write(chr(ord(c)-3))
fw.close