Problem in a python2 file

[sylas]

@wavic
sylvain@sylvain-HP-Laptop-15-bw0xx:~$ python3 -m pip install click
Requirement already satisfied: click in /usr/lib/python3/dist-packages (0.4.46+17.10.20170607.3.0ubuntu1)
launchpadlib 1.10.5 requires testresources, which is not installed.
You are using pip version 10.0.1, however version 18.0 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
@Larz click works well on python 2.7

#python2
import click

click.echo('Do you agree ? [y/n] ', nl=False)
c = click.getchar()
click.echo()
if c == b'y':
    click.echo('We will go on')
elif c == b'n':
    click.echo('Abort!')
    exit()
else:
    click.echo('Invalid input ! ')
    exit()
    
    
print("sylas")