John's suggestion works for me on local sage-8.1beta 4 Le vendredi 8 septembre 2017 16:00:27 UTC+2, HG a écrit : > > https://wiki.sagemath.org/interact/linear_algebra > @interact > def linear_transformation(A=matrix([[1,-1],[-1,1/2]]),theta=slider(0, > 2*pi, .1), r=slider(0.1, 2, .1, default=1)): > v=vector([r*cos(theta), r*sin(theta)]) > w = A*v > circles = sum([circle((0,0), radius=i, color='black') for i in [1..2]]) > pretty_print(html("$%s %s=%s$"%tuple(map(latex, [A, v.column().n(4), > w.column().n(4)])))) > show(v.plot(color='red')+w.plot(color='blue')+circles,aspect_ratio=1) > > I got this error in sagemath 8.1(beta4) > > Any help ? > > Traceback (most recent call > last)/home/pi/sage/local/lib/python2.7/site-packages/ipywidgets/widgets/interaction.pyc > in update(self, *args) 215 value = > widget.get_interact_value() 216 > self.kwargs[widget._kwarg] = value--> 217 self.result = > self.f(**self.kwargs) 218 if self.auto_display and > self.result is not None: 219 display(self.result) > <ipython-input-3-082d256f4933> in linear_transformation(A, theta, r) 4 > w = A*v 5 circles = sum([circle((Integer(0),Integer(0)), radius=i, > color='black') for i in > (ellipsis_range(Integer(1),Ellipsis,Integer(2)))])----> 6 > pretty_print(html("$%s %s=%s$"%tuple(map(latex, [A, v.column().n(Integer(4)), > w.column().n(Integer(4))])))) 7 > show(v.plot(color='red')+w.plot(color='blue')+circles,aspect_ratio=Integer(1)) > /home/pi/sage/src/sage/structure/element.pyx in > sage.structure.element.Element.__getattr__ > (/home/pi/sage/src/build/cythonized/sage/structure/element.c:4286)() 477 > AttributeError: 'LeftZeroSemigroup_with_category.element_class' > object has no attribute 'blah_blah' 478 """--> 479 return > self.getattr_from_category(name) 480 481 cdef > getattr_from_category(self, name): > /home/pi/sage/src/sage/structure/element.pyx in > sage.structure.element.Element.getattr_from_category > (/home/pi/sage/src/build/cythonized/sage/structure/element.c:4395)() 490 > else: 491 cls = P._abstract_element_class--> 492 > return getattr_from_other_class(self, cls, name) 493 494 def > __dir__(self): > /home/pi/sage/src/sage/cpython/getattr.pyx in > sage.cpython.getattr.getattr_from_other_class > (/home/pi/sage/src/build/cythonized/sage/cpython/getattr.c:1822)() 252 > dummy_error_message.cls = type(self) 253 > dummy_error_message.name = name--> 254 raise dummy_attribute_error > 255 attribute = <object>attr 256 # Check for a descriptor (__get__ > in Python) > AttributeError: 'sage.rings.real_mpfr.RealNumber' object has no attribute > 'column' > > > > >
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