print(‘hello world’) \ 行连接符 引用的本质：栈内存与堆内存 海龟图画五环 import turtle turtle.width(10) turtle.color(‘blue’) turtle.circle(50) turtle.penup() turtle.goto(120,0) turtle.pendown() turtle.color(‘black’) turtle.circle(50) turtle.penup() turtle.goto(240,0) turtle.pendown() turtle.color(‘red’) turtle.circle(50) turtle.penup() turtle.goto(60,-50) turtle.pendown() turtle.color(‘yellow’) turtle.circle(50) turtle.penup() turtle.goto(180,-50) turtle.down() turtle.color(‘green’) turtle.circle(50)
