【python案例】坐标轴

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import turtle

turtle.title('坐标轴-金浩轩')


def draw_cs():
    turtle.tracer(False)
    # 设置画笔
    turtle.speed(0)
    turtle.pensize(1)
    turtle.pencolor('gray')
    # 画x轴
    turtle.penup()
    turtle.goto(-400, 0)
    turtle.pendown()
    turtle.goto(400, 0)
    # 画x轴的箭头
    turtle.penup()
    turtle.goto(395, 5)
    turtle.pendown()
    turtle.goto(400, 0)
    turtle.goto(395, -5)
    # 画x轴的点
    for i in range(-400, 400, 50):
        # 画点
        turtle.penup()
        turtle.goto(i, 10)
        turtle.pendown()
        turtle.goto(i, 0)
        # 画字
        turtle.penup()
        if i == 0:  # 对0的处理
            turtle.goto(i - 10, -25)
            turtle.write(i, align='center')
        else:
            turtle.goto(i, -25)
            turtle.write(i, align='center')
        turtle.pendown()
    # 画x轴的X
    turtle.penup()
    turtle.goto(390, -30)
    turtle.pendown()
    turtle.write('x', font=("Arial", 16))
    # 画y轴
    turtle.penup()
    turtle.goto(0, -400)
    turtle.pendown()
    turtle.goto(0, 400)
    # 画y轴的箭头
    turtle.penup()
    turtle.goto(-5, 395)
    turtle.pendown()
    turtle.goto(0, 400)
    turtle.goto(5, 395)
    # 画y轴的点
    for i in range(-400, 400, 50):
        # 画点
        turtle.penup()
        turtle.goto(10, i)
        turtle.pendown()
        turtle.goto(0, i)
        # 画字
        turtle.penup()
        if i == 0:  # 对0的处理
            pass
        else:
            turtle.goto(-25, i - 5)
            turtle.write(i, align='center')
        turtle.pendown()
    # 画y轴的y
    turtle.penup()
    turtle.goto(-30, 380)
    turtle.pendown()
    turtle.write('y', font=("Arial", 16))
    # 恢复初始位置
    turtle.penup()
    turtle.goto(0, 0)
    turtle.pendown()
    turtle.pensize(3)
    turtle.tracer(True)
    turtle.update()

draw_cs()
turtle.mainloop()