文件操作

fr = open('cena.txt',mode='r',encoding='utf-8')
qcj = fr.read()

print('明文：'+qcj)
print('密文：',end='')

fw = open('cena.txt',mode='a',encoding='utf-8')
for c in qcj:
    print(chr(ord(c)+3),end='')
    fw.write(chr(ord(c)+3))

fr.close()
fw.close()

 

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

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