Problem in a python2 file

[sylas]

Hi all ! Because I installed "click" being in python2, I can import "click" only on python2. I cannot use 3.6 for this file. My problem appears at line 19.

import click
import math
print("solver.py  in python2.7")

class Solver:
    def demo(self):
        print("Resolve second degree equation. Enter the coefficients(numbers): a,b,c")
        text = raw_input(' Are you ready: y/n ? ')
        print('you entered:  ', text)
        text = "y"
        while (text == 'y'):
            # while True:
            a = float(input("a "))
            b = float(input("b "))
            c = float(input("c "))
            d = b ** 2 - 4 * a * c
            if d >= 0:
                disc = math.sqrt(d)
                root1 = (-b + disc) / (2 * a)
                root2 = (-b - disc) / (2 * a)
                print(root1, root2)
            else:
                print('This equation has no roots')

            print('do you want to begin again for another equation ?  ')
            #text = raw_input(' y/n  ?   ')
            #print("you entered: ", text)
			click.echo('Do you agree ? y/n ', nl=False)
			text= click.getchar()
			click.echo() 
			if text == b'y':
				click.echo('We wiil continue')
			elif text == b'n':
				click.echo('Abort!')
				exit()
			else:
				click.echo('Invalid input ! ')
				exit()
			

Solver().demo()