Stupid string formatting question

[Michael S. Fischer]

On Fri, 17 May 2002 02:40:27 +0100, Gonçalo Rodrigues
<op73418 at mail.telepac.pt> wrote:

>>Why can't I do this?
>>
>>    def foo(x):
>>      # Do some operations on x yielding a and b
>>      return a, b
>>
>>    print "a = %s, b = %s" % (foo(x))
>>
>>It seems counter-intuitive that although foo is defined to return a 2-item
>>tuple, the interpreter just doesn't get it.
> 
> There must be something you are not telling us. It works fine for me,

OK, here's an example.

    >>> def x():
    ...   return "a", "b"
    ... 
    >>> print "%s/%s/%s/%s" % ("hi", "there", x())
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    TypeError: not enough arguments for format string


-- 
Michael S. Fischer / michael at dynamine.net / +1 650-533-4684
Lead Hacketeer, Dynamine Consulting, Silicon Valley, CA