# drawtree.py
from turtle import turtle, mainloop
def main():
p = turtle()
p.color("green")
p.pensize(5)
#p.setundobuffer(none)
p.hideturtle() #make the turtle invisible. it』s a good idea to do this while you』re in the middle of doing some complex drawing,
#because hiding the turtle speeds up the drawing observably.
#p.speed(10)
# p.getscreen().tracer(1,0)#return the turtlescreen object the turtle is drawing on.
p.speed(10)
#turtlescreen methods can then be called for that object.
p.left(90)# turn turtle left by angle units. direction 調整畫筆
p.penup() #pull the pen up – no drawing when moving.
p.goto(0,-200)#move turtle to an absolute position. if the pen is down, draw line. do not change the turtle』s orientation.
p.pendown()# pull the pen down – drawing when moving. 這三條語句是乙個組合相當於先把筆收起來再移動到指定位置，再把筆放下開始畫
#否則turtle一移動就會自動的把線畫出來
#t = tree([p], 200, 65, 0.6375)
t = tree([p], 200, 65, 0.6375)
main()
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