Python库中的turtledemo模块，里面有非常多的turtle实例。
rosette.py
""" turtle-example-suite:
tdemo_wikipedia3.py
This example is
inspired by the Wikipedia article on turtle
graphics. (See example wikipedia1 for URLs)
First we create (ne-1) (i.e. 35 in this
example) copies of our first turtle p.
Then we let them perform their steps in
parallel.
Followed by a complete undo().
"""
from turtle import Screen, Turtle, mainloop
from time import perf_counter as clock, sleep
def mn_eck(p, ne,sz):
turtlelist = [p]
#create ne-1 additional turtles
for i in range(1,ne):
q = p.clone()
q.rt(360.0/ne)
turtlelist.append(q)
p = q
for i in range(ne):
c = abs(ne/2.0-i)/(ne*.7)
# let those ne turtles make a step
# in parallel:
for t in turtlelist:
t.rt(360./ne)
t.pencolor(1-c,0,c)
t.fd(sz)
def main():
s = Screen()
s.bgcolor("black")
p=Turtle()
p.speed(0)
p.hideturtle()
p.pencolor("red")
p.pensize(3)
s.tracer(36,0)
at = clock()
mn_eck(p, 36, 19)
et = clock()
z1 = et-at
sleep(1)
at = clock()
while any(t.undobufferentries() for t in s.turtles()):
for t in s.turtles():
t.undo()
et = clock()
return "runtime: %.3f sec" % (z1+et-at)
if __name__ == '__main__':
msg = main()
print(msg)
mainloop() 
bytedesign.py
#!/usr/bin/env python3
""" turtle-example-suite:
tdemo_bytedesign.py
An example adapted from the example-suite
of PythonCard's turtle graphics.
It's based on an article in BYTE magazine
Problem Solving with Logo: Using Turtle
Graphics to Redraw a Design
November 1982, p. 118 - 134
-------------------------------------------
Due to the statement
t.delay(0)
in line 152, which sets the animation delay
to 0, this animation runs in "line per line"
mode as fast as possible.
"""
from turtle import Turtle, mainloop
from time import perf_counter as clock
# wrapper for any additional drawing routines
# that need to know about each other
class Designer(Turtle):
def design(self, homePos, scale):
self.up()
for i in range(5):
self.forward(64.65 * scale)
self.down()
self.wheel(self.position(), scale)
self.up()
self.backward(64.65 * scale)
self.right(72)
self.up()
self.goto(homePos)
self.right(36)
self.forward(24.5 * scale)
self.right(198)
self.down()
self.centerpiece(46 * scale, 143.4, scale)
self.getscreen().tracer(True)
def wheel(self, initpos, scale):
self.right(54)
for i in range(4):
self.pentpiece(initpos, scale)
self.down()
self.left(36)
for i in range(5):
self.tripiece(initpos, scale)
self.left(36)
for i in range(5):
self.down()
self.right(72)
self.forward(28 * scale)
self.up()
self.backward(28 * scale)
self.left(54)
self.getscreen().update()
def tripiece(self, initpos, scale):
oldh = self.heading()
self.down()
self.backward(2.5 * scale)
self.tripolyr(31.5 * scale, scale)
self.up()
self.goto(initpos)
self.setheading(oldh)
self.down()
self.backward(2.5 * scale)
self.tripolyl(31.5 * scale, scale)
self.up()
self.goto(initpos)
self.setheading(oldh)
self.left(72)
self.getscreen().update()
def pentpiece(self, initpos, scale):
oldh = self.heading()
self.up()
self.forward(29 * scale)
self.down()
for i in range(5):
self.forward(18 * scale)
self.right(72)
self.pentr(18 * scale, 75, scale)
self.up()
self.goto(initpos)
self.setheading(oldh)
self.forward(29 * scale)
self.down()
for i in range(5):
self.forward(18 * scale)
self.right(72)
self.pentl(18 * scale, 75, scale)
self.up()
self.goto(initpos)
self.setheading(oldh)
self.left(72)
self.getscreen().update()
def pentl(self, side, ang, scale):
if side < (2 * scale): return
self.forward(side)
self.left(ang)
self.pentl(side - (.38 * scale), ang, scale)
def pentr(self, side, ang, scale):
if side < (2 * scale): return
self.forward(side)
self.right(ang)
self.pentr(side - (.38 * scale), ang, scale)
def tripolyr(self, side, scale):
if side < (4 * scale): return
self.forward(side)
self.right(111)
self.forward(side / 1.78)
self.right(111)
self.forward(side / 1.3)
self.right(146)
self.tripolyr(side * .75, scale)
def tripolyl(self, side, scale):
if side < (4 * scale): return
self.forward(side)
self.left(111)
self.forward(side / 1.78)
self.left(111)
self.forward(side / 1.3)
self.left(146)
self.tripolyl(side * .75, scale)
def centerpiece(self, s, a, scale):
self.forward(s); self.left(a)
if s < (7.5 * scale):
return
self.centerpiece(s - (1.2 * scale), a, scale)
def main():
t = Designer()
t.speed(0)
t.hideturtle()
t.getscreen().delay(0)
t.getscreen().tracer(0)
at = clock()
t.design(t.position(), 2)
et = clock()
return "runtime: %.2f sec." % (et-at)
if __name__ == '__main__':
msg = main()
print(msg)
mainloop()
clock.py：实现turtle做的时钟效果
#!/usr/bin/env python3
# -*- coding: cp1252 -*-
""" turtle-example-suite:
tdemo_clock.py
Enhanced clock-program, showing date
and time
------------------------------------
Press STOP to exit the program!
------------------------------------
"""
from turtle import *
from datetime import datetime
def jump(distanz, winkel=0):
penup()
right(winkel)
forward(distanz)
left(winkel)
pendown()
def hand(laenge, spitze):
fd(laenge*1.15)
rt(90)
fd(spitze/2.0)
lt(120)
fd(spitze)
lt(120)
fd(spitze)
lt(120)
fd(spitze/2.0)
def make_hand_shape(name, laenge, spitze):
reset()
jump(-laenge*0.15)
begin_poly()
hand(laenge, spitze)
end_poly()
hand_form = get_poly()
register_shape(name, hand_form)
def clockface(radius):
reset()
pensize(7)
for i in range(60):
jump(radius)
if i % 5 == 0:
fd(25)
jump(-radius-25)
else:
dot(3)
jump(-radius)
rt(6)
def setup():
global second_hand, minute_hand, hour_hand, writer
mode("logo")
make_hand_shape("second_hand", 125, 25)
make_hand_shape("minute_hand", 130, 25)
make_hand_shape("hour_hand", 90, 25)
clockface(160)
second_hand = Turtle()
second_hand.shape("second_hand")
second_hand.color("gray20", "gray80")
minute_hand = Turtle()
minute_hand.shape("minute_hand")
minute_hand.color("blue1", "red1")
hour_hand = Turtle()
hour_hand.shape("hour_hand")
hour_hand.color("blue3", "red3")
for hand in second_hand, minute_hand, hour_hand:
hand.resizemode("user")
hand.shapesize(1, 1, 3)
hand.speed(0)
ht()
writer = Turtle()
#writer.mode("logo")
writer.ht()
writer.pu()
writer.bk(85)
def wochentag(t):
wochentag = ["Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday", "Sunday"]
return wochentag[t.weekday()]
def datum(z):
monat = ["Jan.", "Feb.", "Mar.", "Apr.", "May", "June",
"July", "Aug.", "Sep.", "Oct.", "Nov.", "Dec."]
j = z.year
m = monat[z.month - 1]
t = z.day
return "%s %d %d" % (m, t, j)
def tick():
t = datetime.today()
sekunde = t.second + t.microsecond*0.000001
minute = t.minute + sekunde/60.0
stunde = t.hour + minute/60.0
try:
tracer(False) # Terminator can occur here
writer.clear()
writer.home()
writer.forward(65)
writer.write(wochentag(t),
align="center", font=("Courier", 14, "bold"))
writer.back(150)
writer.write(datum(t),
align="center", font=("Courier", 14, "bold"))
writer.forward(85)
tracer(True)
second_hand.setheading(6*sekunde) # or here
minute_hand.setheading(6*minute)
hour_hand.setheading(30*stunde)
tracer(True)
ontimer(tick, 100)
except Terminator:
pass # turtledemo user pressed STOP
def main():
tracer(False)
setup()
tracer(True)
tick()
return "EVENTLOOP"
if __name__ == "__main__":
mode("logo")
msg = main()
print(msg)
mainloop()
关于此模块的更多详情，可以参考Python turtledemo官方文档