一元多项式加减乘法计算代码

好的，以下是一元多项式加减乘法计算代码示例：

class Polynomial:
    def __init__(self, coeffs):
        self.coeffs = coeffs

    def __add__(self, other):
        res = []
        len1, len2 = len(self.coeffs), len(other.coeffs)
        for i in range(max(len1, len2)):
            x = self.coeffs[i] if i < len1 else 0
            y = other.coeffs[i] if i < len2 else 0
            res.append(x + y)
        return Polynomial(res)

    def __sub__(self, other):
        res = []
        len1, len2 = len(self.coeffs), len(other.coeffs)
        for i in range(max(len1, len2)):
            x = self.coeffs[i] if i < len1 else 0
            y = other.coeffs[i] if i < len2 else 0
            res.append(x - y)
        return Polynomial(res)

    def __mul__(self, other):
        res = [0] * (len(self.coeffs) + len(other.coeffs))
        for i, x in enumerate(self.coeffs):
            for j, y in enumerate(other.coeffs):
                res[i + j] += x * y
        return Polynomial(res)

    def __str__(self):
        return " + ".join((f"{self.coeffs[i]}x^{i}" for i in range(len(self.coeffs)) if self.coeffs[i]))

p1 = Polynomial([1, 2, 3]) # 1x^2 + 2x^1 + 3x^0 
p2 = Polynomial([4, 5, 6]) # 4x^2 + 5x^1 + 6x^0
print(f"p1 + p2 = {p1 + p2}")
print(f"p1 - p2 = {p1 - p2}")
print(f"p1 * p2 = {p1 * p2}")

希望以上代码能够帮到您！现在，请问您有什么其它问题吗？