(self, otherframe)
Returns the angular acceleration Vector of the ReferenceFrame.

        Effectively returns the Vector:
        ^N alpha ^B
        which represent the angular acceleration of B in N, where B is self, and
        N is otherframe.

        Parameters
        ==========

        otherframe : ReferenceFrame
            The ReferenceFrame which the angular acceleration is returned in.

        Examples
        ========

        >>> from sympy.physics.vector import ReferenceFrame, Vector
        >>> N = ReferenceFrame('N')
        >>> A = ReferenceFrame('A')
        >>> V = 10 * N.x
        >>> A.set_ang_acc(N, V)
        >>> A.ang_acc_in(N)
        10*N.x
Returns the angular acceleration Vector of the ReferenceFrame.
Returns the angular acceleration Vector of the ReferenceFrame .
def ang_acc_in(self, otherframe):
        """Returns the angular acceleration Vector of the ReferenceFrame.

        Effectively returns the Vector:
        ^N alpha ^B
        which represent the angular acceleration of B in N, where B is self, and
        N is otherframe.

        Parameters
        ==========

        otherframe : ReferenceFrame
            The ReferenceFrame which the angular acceleration is returned in.

        Examples
        ========

        >>> from sympy.physics.vector import ReferenceFrame, Vector
        >>> N = ReferenceFrame('N')
        >>> A = ReferenceFrame('A')
        >>> V = 10 * N.x
        >>> A.set_ang_acc(N, V)
        >>> A.ang_acc_in(N)
        10*N.x

        """

        _check_frame(otherframe)
        if otherframe in self._ang_acc_dict:
            return self._ang_acc_dict[otherframe]
        else:
            return self.ang_vel_in(otherframe).dt(otherframe)
def ang_acc_in ( self , otherframe ) : _check_frame ( otherframe ) if otherframe in self . _ang_acc_dict : return self . _ang_acc_dict [ otherframe ] else : return self . ang_vel_in ( otherframe ) . dt ( otherframe )