python 简单的绘图

Python自带一套简单的图形开发工具 Turtle 小乌龟 用来画一些简单的二维图形 通过写代码来画画

• import turtle 导入turtle工具

• showturtle() 显示箭头指示 刚开始运行时 箭头指示默认在中心坐标（0,0）

• hideturtle() 隐藏箭头指示

• pendown() 将笔放置在画布上

• penup() 将笔离开画布

• forward(d) 向笔所指的方向前进距离d

• right(angle) 向笔所指的方向右转angle度

• left(angle) 向笔所指的方向左转angle度

• goto(x,y) 跳转到某一坐标x y

• setx(x) 单独设置x坐标

• sety(y) 单独设置y坐标

• circle(r，ext，steps) 画圈 r 半径 steps阶数

• pensize(n) 调整笔的粗细

• color(c) 设置颜色

• write("文本",font = ("字体" , 字号 , "bold"))

• done() 绘制结束

• speed(0) 设置绘制的速度0最快 10最慢

• setheading(n) 0东 90北 180西 270南

实践：

        

 图1：

import turtle
turtle.showturtle()
turtle.penup()
turtle.goto(50,50)
turtle.pendown()
turtle.forward(200)
turtle.left(90)
turtle.forward(200)
turtle.left(90)
turtle.forward(200)
turtle.left(90)
turtle.forward(200)
turtle.left(90)
turtle.forward(100)
turtle.left(90)
turtle.forward(200)
turtle.left(90)
turtle.forward(100)
turtle.left(90)
turtle.forward(100)
turtle.left(90)
turtle.forward(200)

turtle.done()

图2：

import turtle
turtle.showturtle()
turtle.penup()
turtle.goto(50,50)
turtle.pendown()
turtle.forward(100)
turtle.setheading(180)
turtle.forward(50)
turtle.right(90)
turtle.forward(50)
turtle.left(180)
turtle.forward(100)

turtle.done()

图3：

import turtle
turtle.showturtle()
turtle.penup()
turtle.goto(50,50)
turtle.right(60)
turtle.pendown()
turtle.forward(100)
turtle.right(120)
turtle.forward(100)
turtle.right(120)
turtle.forward(100)
turtle.done()

图4：

import turtle
turtle.showturtle()
turtle.penup()
turtle.goto(50,50)
turtle.right(60)
turtle.pendown()
turtle.forward(100)
turtle.right(120)
turtle.forward(100)
turtle.right(120)
turtle.forward(200)
turtle.left(120)
turtle.forward(100)
turtle.left(120)
turtle.forward(100)
turtle.done()

图5：

1

图6：

import turtle
turtle.showturtle()
turtle.penup()
turtle.goto(50,50)
turtle.pendown()
turtle.pensize(2)
turtle.circle(100)
turtle.penup()
turtle.goto(50,150)
turtle.pendown()
turtle.forward(80)
turtle.penup()
turtle.goto(50,150)
turtle.pendown()
turtle.left(90)
turtle.forward(80)
turtle.hideturtle()
turtle.penup()
turtle.goto(50,235)
turtle.pendown()
turtle.write("12")
turtle.penup()
turtle.goto(50,150)
turtle.setheading(180)
turtle.forward(95)
turtle.pendown()
turtle.write("9")

turtle.penup()
turtle.goto(50,150)
turtle.setheading(270)
turtle.forward(95)
turtle.pendown()
turtle.write("6")

turtle.penup()
turtle.goto(50,150)
turtle.setheading(360)
turtle.forward(95)
turtle.pendown()
turtle.write("3")

turtle.penup()
turtle.goto(40,50)
turtle.setheading(270)
turtle.forward(15)
turtle.pendown()
turtle.write("9:15:00")

turtle.done()