What is the class of myobj?

[Mark McEahern]

[Erik Max Francis]
> It usually isn't.  When you're expecting a sequence type is a good
> example, because there are some basic builtin sequence types (tuples and
> lists), but there's also builtin functions which generate objects that
> _act_ like builtin sequence types (for instance, the return value of
> xrange or F.xreadlines), and of course there are user-defined sequence
> types.

And then there are strings, which are also sequence like--but you don't
always want to iterate through them.

E.g.,

def make_list(x):
    """
    Return x as a list.  If x is already a list or sequence type, return x.
    """
    # Obviously, I'm missing user-defined sequence types.
    sequence_types = (list, tuple)
    if not isinstance(x, sequence_types):
        l = [x]
    else:
        l = x
    return l

// m


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