Python code coverage for Lib/turtledemo/chaos.py

#	count	content
1	n/a	# File: tdemo_chaos.py
2	n/a	# Author: Gregor Lingl
3	n/a	# Date: 2009-06-24
4	n/a
5	n/a	# A demonstration of chaos
6	n/a
7	n/a	from turtle import *
8	n/a
9	n/a	N = 80
10	n/a
11	n/a	def f(x):
12	n/a	return 3.9x(1-x)
13	n/a
14	n/a	def g(x):
15	n/a	return 3.9(x-x*2)
16	n/a
17	n/a	def h(x):
18	n/a	return 3.9x-3.9x*x
19	n/a
20	n/a	def jumpto(x, y):
21	n/a	penup(); goto(x,y)
22	n/a
23	n/a	def line(x1, y1, x2, y2):
24	n/a	jumpto(x1, y1)
25	n/a	pendown()
26	n/a	goto(x2, y2)
27	n/a
28	n/a	def coosys():
29	n/a	line(-1, 0, N+1, 0)
30	n/a	line(0, -0.1, 0, 1.1)
31	n/a
32	n/a	def plot(fun, start, color):
33	n/a	pencolor(color)
34	n/a	x = start
35	n/a	jumpto(0, x)
36	n/a	pendown()
37	n/a	dot(5)
38	n/a	for i in range(N):
39	n/a	x=fun(x)
40	n/a	goto(i+1,x)
41	n/a	dot(5)
42	n/a
43	n/a	def main():
44	n/a	reset()
45	n/a	setworldcoordinates(-1.0,-0.1, N+1, 1.1)
46	n/a	speed(0)
47	n/a	hideturtle()
48	n/a	coosys()
49	n/a	plot(f, 0.35, "blue")
50	n/a	plot(g, 0.35, "green")
51	n/a	plot(h, 0.35, "red")
52	n/a	# Now zoom in:
53	n/a	for s in range(100):
54	n/a	setworldcoordinates(0.5*s,-0.1, N+1, 1.1)
55	n/a	return "Done!"
56	n/a
57	n/a	if __name__ == "__main__":
58	n/a	main()
59	n/a	mainloop()