[Tutor] Unexpected iterator

[Jeff R. Allen]

Hello,

I am working my way through the tutorial, and I like trying
variations, just to see what expected errors look like, and other ways
things could be written.

I tried a, b = 0, 0 and that worked.

Then I tried this to (maybe) set both a and b to 0:

>>> a, b = 0
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'int' object is not iterable

I understand why it doesn't work, but I don't understand the wording
of the exception. Could someone explain how I accidentally introduced
iteration into the picture with my syntax? I have a feeling there's an
interesting lesson hidden in this example...

Thanks.

  -jeff