memory.py 文件源码

def leading_term(expr, *args):
    """
    Returns the leading term in a sympy Polynomial.

    expr: sympy.Expr
        any sympy expression

    args: list
        list of input symbols for univariate/multivariate polynomials
    """
    expr = sympify(str(expr))
    P = Poly(expr, *args)
    return LT(P)
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