python turtle 语法学习

基础语法

# 前进 50 单位
go(50)

# 转向 90 度
turn(90)

# 绿色线条
color("green")

# 设置线条宽度为10
width(10)

# 重置
reset()

# 隐藏乌龟
invisible()

# 显示乌龟
visible()

# 抬笔
pen_up()

# 落笔
pen_down()

# 清空
clear()

# for...in... 循环

for i in range(3):
    pass

# 方法定义
def polygon(n):
    ...

学习代码：

lv1:

# 示例1
def lv1():
    reset()
    go(50)
    turn(90)
    go(200)
    turn(-90)
    go(50)
    turn(-90)
    color("green")
    go(100)
    color("white")
    go(100)
    width(10)
    go(100)
    turn(-90)
    width(1)
    go(100)
    width(50)
    go(100)

lv1()

lv2:

# 示例2
def lv2():
    reset()
    go(50)
    turn(90)
    invisible()
    go(100)
    visible()
    turn(90)
    pen_up()
    go(100)
    turn(90)
    go(50)
    pen_down()
    go(50)
    clear()
    go(100)

lv2()

lv3:

def lv3():
    reset()
    for i in range(3):
        go(100)
        turn(360/3)
    color("white")
    for i in range(4):
        go(100)
        turn(360/4)
    color("blue")
    for i in range(5):
        go(100)
        turn(360/5)
    turn(-90)
    for i in range(40):
        width(i)
        go(4)
    color("red")
    width(3)
    for i in range(36):
        go(10)
        turn(360/36)

lv3()

lv4:

# 示例4

def polygon(n):
    for i in range(n):
        go(50)
        turn(360.0/n)

def circle():
    polygon(36)

def lv4():
    reset()
    for i in range(36):
        for i in range(36):
            go(10)
            turn(360/36)
        turn(10)
    clear()
    polygon(5)
    clear()
    for i in range(3,10):
        polygon(i)
    clear()
    for i in range(3,15):
        polygon(i)
        turn(30)
    clear()
    color_list=["red","green","blue","purple","orange","yellow"]
    for i in color_list:
        color(i)
        circle()
        turn(60)

lv4()

# 正方形
def square(width):
    reset()
    for i in range(4):
        go(width)
        turn(90)

square(100)