On Aug 4, 10:49 pm, Mensanator <mensana...@aol.com> wrote: > 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. > 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 > Warning: Completely untested fix ahead!
What happens if you change turtle.py to use nhops=1+int((math.sqrt(diffsq)/(3*math.pow(1.1, self._speed) *self._speed)) casevh -- http://mail.python.org/mailman/listinfo/python-list
