Hello,
it is said in the documentation that getchar function always returns unicode there, but when i tried to use the code snippet of the documentation on my windows 10 machine, i always fell on "invalid input :("

I inspected the type of value returned and I realized that it was bytes. So either you have to change the documentation and the code like this:

    click.echo('Continue? [yn] ', nl=False)
    c = click.getchar()
    if c == b'y':
        click.echo('We will go on')
    elif c == b'n':
        click.echo('Abort!')
    else:
        click.echo('Invalid input :(')

either the problem have to be solved..

I'm using click 6.7, python 3.6 and I'm working under windows 10.