Why am I continuing to get this error: TypeError: object "bool" is not iterable?

Question

I am making a text adventure game as part of my Learning Python book ... Anyway, this is what I am trying to do:

def is_a_song(song):
    valid_sung_songs = ["song 1", "song 2", "song 3"]
    valid_unsung_songs = ["s1", "s2", "s3"]
    if song.lower() in valid_sung_songs:
        return (True, 0)
    elif song.lower() in valid_unsung_songs:
        return (True, 1)
    else:
        return False

def favorite_song():
    choice = raw_input("> ")
    is_song, has_sung = is_a_song(choice)

    if is_song and (has_sung == 0):
         print "Good Song"
    elif is_song and (has_sung == 1):
         print "Good Song, But I haven't sung it"
    else:
         print "Not a valid song"

favorite_song()

Now this is just an abridged version of the code that I actually used, but when it is executed, it works when the song is valid and executed, when it is valid and non-sung, but it crashes in the last else statement:

else:
    print "Not a valid song"

With an error:

TypeError: 'bool' object is not iterable

If you need the actual code that I use, it is here:

• ex36songs.py: http://pastebin.com/EY54KJAK
• ex36.py: http://pastebin.com/a0vuZrxv (go to the phoebe () function :)

Answer 1

False, False :

def is_a_song(song):
    ...
    else:
        return False, False

:

:

if song.lower() in valid_sung_songs:
    return True, False
elif song.lower() in valid_unsung_songs:
    return True, True
else:
    return False, False

:

if is_song and not has_sung:
     print "Good Song"
elif is_song and has_sung:
     print "Good Song, But I haven't sung it"
else:
     print "Not a valid song"

, .

is_song, has_sung = is_a_song(choice)