[Rest2web-develop] odict doctests and fixes done

[Nicola L. <ni...@te...>]

I've completed the doctests for odict.py, and reworked the whole file.

It's unbelievable how long it takes to fix all the corner cases, and how
much tests help. :-) I simplified and fixed most of the code.

I also restricted a couple of things.

Now an OrderedDict can only be init'ed from a sequence of 2-item sequences,
like a plain dict:

d = OrderedDict((
    (1, 1),
    (2, 2),
    (3, 3),
))

or else it can be created empty, and the have items set aftewards:

d = OrderedDict()
d[1] = 1
d[2] = 2
d[3] = 3

Neither a plain dict nor keyword args can be passed in anymore, because
there's no way to determine the order of items, with them.

The same holds for updates and comparisons: they're only meaningful between
OrderedDicts.

-- 
Nicola Larosa - ni...@te...

Does it seem like I'm looking for an answer
To a question I can't ask
 -- Norah Jones, Nightingale, Come Away with Me, 2001