Mensanator schrieb:
I hadn't noticed this before, but the overhaul of Turtle Graphics
dating
back to 2.6 has been broken as far as gmpy is concerned.
I hadn't noticed because I usually have tracing turned off (tracing
off
takes 3-4 seconds, tracing on takes 6-7 minutes).
In 3.1, tracing is now a screen attribute, not a turtle atribute.
I have no idea why
tooter = turtle.Turtle()
tooter.tracer(False)
doesn't give me an error (I thought silent errors were a bad thing).
Hi,
on my machine I get:
Python 3.1 (r31:73574, Jun 26 2009, 20:21:35) [MSC v.1500 32 bit
(Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> import turtle
>>> tooter = turtle.Turtle()
>>> tooter.tracer(False)
Traceback (most recent call last):
File "<pyshell#2>", line 1, in <module>
tooter.tracer(False)
AttributeError: 'Turtle' object has no attribute 'tracer'
>>>
I'd like to help with your problem but I'd much better be
able to analyze it, if I had a version of your script,
which works as you intended with Python 2.5 and the old
turtle module. Could you please post it?
(The one you posted below uses some commands of the
turtle 2.6 module which are not present in 2.5, so it
doesn't run with Python 2.5)
Regards,
Gregor
Had to change to
tooter = turtle.Turtle()
tooter.screen.tracer(False) # tracer now a screen attribute
to turn tracing off in 3.1.
Naturally, having tracing on caused my program to crash. The 2.6
version
seemed to work, but only because turning off tracing as a turtle
attribute
works in 2.6.
So I turned it back on and it crashed too.
2.5 worked okay.
The reason is that code in turtle.py was chabged from
v2.5
if self._drawing:
if self._tracing:
dx = float(x1 - x0)
dy = float(y1 - y0)
distance = hypot(dx, dy)
nhops = int(distance)
to
v3.1
if self._speed and screen._tracing == 1:
diff = (end-start)
diffsq = (diff[0]*screen.xscale)**2 + (diff[1]
*screen.yscale)**2
nhops = 1+int((diffsq**0.5)/(3*(1.1**self._speed)
*self._speed))
Unfortunately, that calculation of nhops is illegal if diffsq is
an .mpf (gmpy
floating point). Otherwise, you get
Traceback (most recent call last):
File "K:\user_python26\turtle\turtle_xy_Py3.py", line 95, in
<module>
tooter.goto(the_coord)
File "C:\Python31\lib\turtle.py", line 1771, in goto
self._goto(Vec2D(*x))
File "C:\Python31\lib\turtle.py", line 3165, in _goto
nhops = 1+int((diffsq**0.5)/(3*(1.1**self._speed)*self._speed))
ValueError: mpq.pow fractional exponent, inexact-root
So when using gmpy, you have to convert the .mpz to int before calling
turtle
functions. (if tracing is on).
demo code (fixed code commented out)
import gmpy
## (even) hi----|
## |
## lo (odd)
## or
##
## (even) lo
## |
## |
## ----hi (odd)
##
##
##
##
import turtle
tooter = turtle.Turtle()
tooter.hideturtle()
tooter.speed('fast')
turtle.update()
# make tracer false and it works
#tooter.screen.tracer(False) # tracer now a screen attribute
tooter.penup()
tooter.color('black')
s = ['1','0']
while len(s[0])<10000:
s = [''.join(s), s[0]]
origin = [0,0]
if s[0] == '0':
tooter.goto(origin)
tooter.dot(1)
if s[1] == '0':
tooter.goto([1,0])
tooter.dot(1)
print(len(s[0]))
for i,j in enumerate(s[0]):
the_coord=[]
cur_root = gmpy.sqrt(i)
lo__root = gmpy.sqrt(i)**2
hi__root = ((gmpy.sqrt(i)+1)**2)
## cur_root = int(gmpy.sqrt(i))
## lo__root = int(gmpy.sqrt(i)**2)
## hi__root = int(((gmpy.sqrt(i)+1)**2))
if hi__root%2==0:
side = 'northeast'
else:
side = 'southwest'
elbow = (hi__root - lo__root)//2 + lo__root + 1
if i>= elbow:
side_len = i - elbow
elbow_plus = True
else:
side_len = elbow - i
elbow_plus = False
if side == 'northeast':
elbow_offset = [(gmpy.sqrt(elbow)-1)//2 +1,-((gmpy.sqrt(elbow)-1)//
2) +1]
else:
elbow_offset = [-((gmpy.sqrt(elbow)-1)//2 +1),((gmpy.sqrt
(elbow)-1)//2 +1)]
## if side == 'northeast':
## elbow_offset = [int((gmpy.sqrt(elbow)-1)//2 +1),-int(((gmpy.sqrt
(elbow)-1)//2) +1)]
## else:
## elbow_offset = [-int(((gmpy.sqrt(elbow)-1)//2 +1)),int
(((gmpy.sqrt(elbow)-1)//2 +1))]
elbow_coord = [origin[0]+elbow_offset[0],origin[1]+elbow_offset[1]]
if i != hi__root and i != lo__root:
if i == elbow:
the_coord = elbow_coord
else:
if elbow_plus:
if side == 'northeast':
the_coord = [elbow_coord[0]-side_len,elbow_coord[1]]
else:
the_coord = [elbow_coord[0]+side_len,elbow_coord[1]]
else:
if side == 'northeast':
the_coord = [elbow_coord[0],elbow_coord[1]+side_len]
else:
the_coord = [elbow_coord[0],elbow_coord[1]-side_len]
else:
if i % 2 == 0: # even square
n = gmpy.sqrt(i)//2 - 1
## n = int(gmpy.sqrt(i)//2) - 1
the_coord = [-n, -n-1]
else:
n = (gmpy.sqrt(i)-1)//2 - 1
## n = int((gmpy.sqrt(i)-1)//2) - 1
the_coord = [1+n, 1+n]
if j == '0':
tooter.goto(the_coord)
tooter.dot(2)
print('done')
turtle.update()
turtle.done()
print('done')
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