(f, m, j, u, K)
return _rec_diff_in(f, m, u, 0, j, K)
``m``-th order derivative in ``x_j`` of a polynomial in ``K[X]``.

    Examples
    ========

    >>> from sympy.polys import ring, ZZ
    >>> R, x,y = ring("x,y", ZZ)

    >>> f = x*y**2 + 2*x*y + 3*x + 2*y**2 + 3*y + 1

    >>> R.dmp_diff_in(f, 1, 0)
    y**2 + 2*y + 3
    >>> R.dmp_diff_in(f, 1, 1)
    2*x*y + 2*x + 4*y + 3
``m``-th order derivative in ``x_j`` of a polynomial in ``K[X]``.
m - th order derivative in x_j of a polynomial in K [ X ] .
def dmp_diff_in(f, m, j, u, K):
    """
    ``m``-th order derivative in ``x_j`` of a polynomial in ``K[X]``.

    Examples
    ========

    >>> from sympy.polys import ring, ZZ
    >>> R, x,y = ring("x,y", ZZ)

    >>> f = x*y**2 + 2*x*y + 3*x + 2*y**2 + 3*y + 1

    >>> R.dmp_diff_in(f, 1, 0)
    y**2 + 2*y + 3
    >>> R.dmp_diff_in(f, 1, 1)
    2*x*y + 2*x + 4*y + 3

    """
    if j < 0 or j > u:
        raise IndexError("0 <= j <= %s expected, got %s" % (u, j))

    return _rec_diff_in(f, m, u, 0, j, K)
def dmp_diff_in ( f , m , j , u , K ) : if j < 0 or j > u : raise IndexError ( "0 <= j <= %s expected, got %s" % ( u , j ) ) return _rec_diff_in ( f , m , u , 0 , j , K )