使用turtle画房子

[coagenth]

刚学python，做了一个练习，是画出地点和大小随机的几个小房子。
代码如下：

#houses.py
#draw houses
from turtle import *
from random import randrange
def base(x,y,width,height):
    penup()
    goto(x,y)
    pendown()
    fillcolor('brown')
    begin_fill()
    fd(width)
    left(30)
    fd(width/3)
    left(60)
    fd(height)
    end_fill()
    penup()
    goto(x+width,y)
    pendown()
    fillcolor('blue')  
    begin_fill()  
    fd(height)
    left(90)
    fd(width)
    left(90)
    fd(height)
    left(90)
    fd(width)
    end_fill()
    penup()
    goto(x,y)
def roof(x,y,width,height):    
    seth(90)
    penup()
    fd(height)
    right(45) 
    pendown()
    fillcolor('black')
    begin_fill()
    fd(width/3)   
    right(45)
    fd(width)
    right(135)
    fd(width/3)
    end_fill()
    penup()
    bk(width/3)
    left(80)
    pendown()
    fillcolor('brown')
    begin_fill()
    fd(width/9)
    seth(-90)
    right(60)
    fd(width/3)
    end_fill()
    penup()
    goto(x,y)
def door(x,y,width,height):
    penup()
    seth(0)
    goto(x+3/8*width,y)
    left(90)
    fillcolor('red')
    pendown()
    begin_fill()
    fd(2/3*height)
    right(90)
    fd(1/4*width)
    right(90)
    fd(2/3*height)
    right(90)
    end_fill()
    penup()
    fd(1/4*width)
    right(90)
    fd(1/3*height)
    right(90)
    fd(5)
    pendown()
    fillcolor('pink')
    begin_fill()
    circle(5)
    end_fill()
    penup()
    goto(x,y)
def windows(x,y,width,height):
    goto(x+1/8*width,y+1/2*height)
    pendown()
    seth(0)
    fillcolor('cyan')
    begin_fill()
    for i in range(4):        
        fd(1/8*width)
        left(90)
    end_fill()
    fd(1/16*width)
    fillcolor('pink')
    begin_fill()
    circle(width/16)
    end_fill()
    penup()    
    goto(x+3/4*width,y+1/2*height)
    pendown()
    seth(0)
    fillcolor('cyan')
    begin_fill()
    for i in range(4):        
        fd(1/8*width)
        left(90)
    end_fill()
    fd(1/16*width)
    fillcolor('pink')
    begin_fill()
    circle(width/16)
    end_fill()
    penup()
    goto(x,y)
    hideturtle()

def main():
    i=0
    x=[-300,-200,-100,0,100,200,300]
    y=[-300,-200,-100,0,100,200,300]
    while i <7:
       #x=randrange(-300,300,100)
        width=randrange(100,300,50)
        height=randrange(50,200,40)
        base(x[i],y[i],width,height)        
        roof(x[i],y[i],width,height)        
        door(x[i],y[i],width,height)        
        windows(x[i],y[i],width,height)          
        i+=1
main()
exitonclick()