On Mon, Jan 20, 2014 at 12:09 PM, Charles Hixson
<charleshi...@earthlink.net> wrote:
> class RODict:
> #Instance Variable Doc
> ## @var _ddict
> # This variable holds the reference to the dict.
>
> ## Class initializer.
> # @param ddict The data dictionary to which this is a read only
> # access.
> # @throws TypeError if ddict is not a dict.
> def __init__ (self, ddict = {}):
> if not isinstance(ddict, dict):
> raise TypeError("ddict must be a dict. It is " +
> repr(ddict))
> self._ddict = ddict
When I see this isinstance, I think "Gee, that means none of the
dict-like-objects I recently compared would work with this class."
The comparison is at the URL below; all the things compared are trees
that provide a dictionary-like interface, but also find_min, find_max
and can iterate in key order. I don't think any of them inherit from
dict, but they are all dict-like in a duck-typed sense:
http://stromberg.dnsalias.org/~strombrg/python-tree-and-heap-comparison/2014-01/
HTH
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