meijerint.py 文件源码

def _mul_args(f):
    """
    Return a list ``L`` such that Mul(*L) == f.

    If f is not a Mul or Pow, L=[f].
    If f=g**n for an integer n, L=[g]*n.
    If f is a Mul, L comes from applying _mul_args to all factors of f.
    """
    args = Mul.make_args(f)
    gs = []
    for g in args:
        if g.is_Pow and g.exp.is_Integer:
            n = g.exp
            base = g.base
            if n < 0:
                n = -n
                base = 1/base
            gs += [base]*n
        else:
            gs.append(g)
    return gs