如果系数为零,如何跳过某些部分字符串?

How to skip certain part strings if the coefficient is zero?

在这个问题中,我们想要return这个结果的函数但是我不希望发生像0^5这样的事情(因为0^5等于0而且我不想显示那,我要怎么写代码让系统检测到这几个部分都是0呢?而当我想用Class Poly中的度数函数的时候,我要插入的多边形数是最高的系数,怎么才能我这样做吗?我们可以稍后放置插入功能,这是我的代码:

Class Poly():
    def __init__(self,coe=[]):
        self.coefficient=coe
    def degree(self,poly=int()):
        self.highestpoly=poly
    def insert(self,polynomial,coefficient):
        self.polynomial=polynomial
        self.coefficient=coefficient #solve that later
    def __str__(self):
        e=self.coefficient[5]
        c=self.coefficient[4]
        a=self.coefficient[3]
        b=self.coefficient[2]
        z=self.coefficient[1]
        d=self.coefficient[0]
        epart=str(e)+str("^")+str(5)+'+'
        cpart=str(c)+str("^")+str(4)+'+'
        apart=str(a)+str("^")+str(3)+'+'
        bpart=str(b)+str("^")+str(2)+'+'
        zpart=str(c)+str("^")+str(1)+'+'
        dpart=str(d)
        return epart+cpart+apart+bpart+zpart+dpart


print(Poly([0,0,3,2,1,0]))
>>> tommy1111@infra04-wg013 lab11 % python3 -i mycode.py 0^5+1^4+2^3+3^2+1^1+0 (result)

这是我认为你想要的代码,系数的顺序是错误的,但这不是主要问题。

class Poly():
    def __init__(self, coe=None):
        if coe is None:
            coe = []
        self.coefficient = coe

    def degree(self, poly=int()):
        self.highestpoly = poly

    def insert(self, polynomial, coefficient):
        self.polynomial = polynomial
        self.coefficient = coefficient  # solve that later

    def __str__(self):
        p = []
        for i, c in enumerate(self.coefficient):
            if c != 0:
                p.append(f"{c}x^{i}")

        return " + ".join(p)

print(Poly([0,0,3,2,1,0]))

输出:

3x^2 + 2x^3 + 1x^4