polinom.py

class Polinom:
    def __init__(self, katsayilar):
        self.katsayilar = katsayilar

    def __str__(self):
        denklem = []
        for index, katsayi in enumerate(self.katsayilar):
            us = len(self.katsayilar) - index - 1
            if katsayi != 0:
                if katsayi != 1:
                    if us not in [0, 1]:
                        denklem.append(str(katsayi) + 'x^' + str(us))
                    elif us == 1:
                        denklem.append(str(katsayi) + "x")
                    else:
                        denklem.append(str(katsayi))
                else:
                    if us not in [0, 1]:
                        denklem.append('x^' + str(us))
                    elif us == 1:
                        denklem.append("x")
                    else:
                        denklem.append(str(katsayi))
        return (' + '.join(denklem))

print Polinom([1, 2, 3, 4, 0, 1])
# "x^5 + 2x^4 + 3x^3 + 4x^2 + 1"

print Polinom([0, 2, 0, 0])
# 2x^2