On 11/4/2012 7:45 AM, Dave Angel wrote:
What I wonder about is why list's __add__ is so fussy.
Guido's reason is that it is not clear what the types of [1,2] + (3,4),
(1,2) + [3,4], [] + range(4), range(2) + [3,4], etcetera should be. Such
mixtures may be bugs. Seq.__add__ exists to impleme
On 11/04/2012 06:57 AM, Ulrich Eckhardt wrote:
> Hi everybody!
>
> I was just smacked by some very surprising Python 2.7 behaviour. I was
> assembling some 2D points into a list:
>
> points = []
> points += (3, 5)
> points += (4, 6)
>
> What I would have expected is to have [(3, 5), (4, 6)], in
Quick aside, you can insert tuples without much effort: `points += ((3,5),)`
And also that I can't do the reverse, i.e.:
>>> foo = tuple()
>>> foo += [5,6]
Traceback (most recent call last):
File "", line 1, in
TypeError: can only concatenate tuple (not "list") to tuple
On Sun, Nov 4, 2012 at
