Python multimap
Michele Petrazzo
michele.petrazzo at TOGLIunipex.it
Wed Aug 27 10:12:29 EDT 2008
brad wrote:
> Recently had a need to us a multimap container in C++. I now need to
> write equivalent Python code. How does Python handle this?
>
> k['1'] = 'Tom'
> k['1'] = 'Bob'
> k['1'] = 'Joe'
> ....
>
> Same key, but different values. No overwrites either.... They all must
> be inserted into the container
>
Subclassing the builtin dict?
class d(dict):
def __setitem__(self, item, value):
if not item in self: super(d, self).__setitem__(item, [])
self[item].append(value)
>>> D = d()
>>> D[1] = "Hello"
>>> D[1] = "World!"
>>> D[1]
['Hello', 'World!']
> Thanks,
> Brad
Michele
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