Its fixed now. On Friday, February 7, 2014 3:14:54 PM UTC+5:30, TARUN GABA wrote: > > Hi, > I am curious about how the Vector.express function behaves, when we call > it from a Zero Vector. > For example: > > >>>from sympy.physics.mechanics.point import Point > >>>A = Point() > >>>type(A) > sympy.physics.mechanics.point.Point > >>>A.pos_from(A) > 0 > >>>type(A.pos_from(A)) > sympy.physics.mechanics.essential.Vector > > Now When I call "express" method from this particular Zero Vector, say "I" > is my sympy.physics.mechanics.essential.ReferenceFrame > > Now, > >>> A.pos_from(A).express(I) > 0 > >>> type(A.pos_from(A).express(I)) > sympy.core.numbers.Zero > > I am not sure whether it is a bug, or it should behave like this only. > Shouldn't it return sympy.core.numbers.Vector instead? > > Thanks >
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