Python code coverage for Lib/turtledemo/tree.py

#	count	content
1	n/a	#!/usr/bin/env python3
2	n/a	""" turtle-example-suite:
3	n/a
4	n/a	tdemo_tree.py
5	n/a
6	n/a	Displays a 'breadth-first-tree' - in contrast
7	n/a	to the classical Logo tree drawing programs,
8	n/a	which use a depth-first-algorithm.
9	n/a
10	n/a	Uses:
11	n/a	(1) a tree-generator, where the drawing is
12	n/a	quasi the side-effect, whereas the generator
13	n/a	always yields None.
14	n/a	(2) Turtle-cloning: At each branching point
15	n/a	the current pen is cloned. So in the end
16	n/a	there are 1024 turtles.
17	n/a	"""
18	n/a	from turtle import Turtle, mainloop
19	n/a	from time import clock
20	n/a
21	n/a	def tree(plist, l, a, f):
22	n/a	""" plist is list of pens
23	n/a	l is length of branch
24	n/a	a is half of the angle between 2 branches
25	n/a	f is factor by which branch is shortened
26	n/a	from level to level."""
27	n/a	if l > 3:
28	n/a	lst = []
29	n/a	for p in plist:
30	n/a	p.forward(l)
31	n/a	q = p.clone()
32	n/a	p.left(a)
33	n/a	q.right(a)
34	n/a	lst.append(p)
35	n/a	lst.append(q)
36	n/a	for x in tree(lst, l*f, a, f):
37	n/a	yield None
38	n/a
39	n/a	def maketree():
40	n/a	p = Turtle()
41	n/a	p.setundobuffer(None)
42	n/a	p.hideturtle()
43	n/a	p.speed(0)
44	n/a	p.getscreen().tracer(30,0)
45	n/a	p.left(90)
46	n/a	p.penup()
47	n/a	p.forward(-210)
48	n/a	p.pendown()
49	n/a	t = tree([p], 200, 65, 0.6375)
50	n/a	for x in t:
51	n/a	pass
52	n/a	print(len(p.getscreen().turtles()))
53	n/a
54	n/a	def main():
55	n/a	a=clock()
56	n/a	maketree()
57	n/a	b=clock()
58	n/a	return "done: %.2f sec." % (b-a)
59	n/a
60	n/a	if __name__ == "__main__":
61	n/a	msg = main()
62	n/a	print(msg)
63	n/a	mainloop()