question: parameters for create_polygon() method

[Andrew Bennetts]

On Wed, May 05, 2004 at 08:50:24AM +0200, Peter Otten wrote:
> Andrew Bennetts wrote:
> 
> > Sorry, I misinterpreted the problem slightly; I just checked the docs for
> > create_polygon and realised it takes an argument that is a sequence of
> > co-ords, rather than a variable number of args that are the co-ords.
> 
> I just tried it - it may not be in the docs, but it does work.
> For example
> 
[...]
> points = [(20, 20), (50, 150), (200, 50)]
> 
> canvas.create_polygon(fill="blue", *points)
[...]

Heh.  I guess either the docs I found with google were wrong, or I misread
them :)

Odd, though -- I thought that calls that put non-keyword args after keyword
args were a syntax error, but using varargs syntax seems to workaround that
-- e.g. try: 
    canvas.create_polygon(fill="blue", (20, 20), (50, 150), (200, 50))

Or without Tk:

    >>> def f(*args, **kw): print args, kw
    ... 
    >>> f(x=1, 2)
    SyntaxError: non-keyword arg after keyword arg
    >>> f(x=1, *[2])
    (2,) {'x': 1}

Interesting.

-Andrew.