parameters: (self, u, v)
docstring: Subtract two vectors and the result is placed in self vector.
          @param u the first operand of the subtraction.
          @param v the second opernd of the subtraction
docstring_summary: Subtract two vectors and the result is placed in self vector.
docstring_tokens: Subtract two vectors and the result is placed in self vector .
function: def subtraction2(self, u, v):
          """
          Subtract two vectors and the result is placed in self vector.
          @param u the first operand of the subtraction.
          @param v the second opernd of the subtraction
          """
          self.d0 = u.d0 - v.d0
          self.d1 = u.d1 - v.d1
          self.d2 = u.d2 - v.d2
function_tokens: def subtraction2 ( self , u , v ) : self . d0 = u . d0 - v . d0 self . d1 = u . d1 - v . d1 self . d2 = u . d2 - v . d2