Printing a polynomial in python

Question

I\'m making a Polynomial python class and as part of that, I need to print a polynomial nicely. The class is given a list that represents the coefficients of the polynomial

Answer 1

This should print: 2*x^2 + 3*x + 4*1 for p1

class Polynomial:

def __init__(self, coefficients):
    self.coeffs=coefficients

def __str__(self):
    out = ''
    size = len(self.coeffs)    
    for i in range(size):      #To Solve the ignored coefficient
        if self.coeffs[i] != 0:
            out += ' + %g*x^%d' % (self.coeffs[i],size-i-1)   #To solve Backwards order
    # Fixing
    out = out.replace('+ -', '- ')
    out = out.replace('x^0', '1')
    out = out.replace(' 1*', ' ')
    out = out.replace('x^1 ', 'x ')
    if out[0:3] == ' + ':  # remove initial +
        out = out[3:]
    if out[0:3] == ' - ':  # fix spaces for initial -
        out = '-' + out[3:]
    return out




a = Polynomial([2,3,4])


print(a)