On May 19, 9:33 am, Jia Lu <[EMAIL PROTECTED]> wrote:
> I see dict type can do 1-to-1 pattern, But is there any method to do
> 1-to-many, many-to-1 and many-to-many pattern ?
>>> mm = {'a': ['A', 'B', 'C'], 'c': ['C', 'D', 'E'], 'b': ['A', 'D']}
>>> # Now, invert the relation
>>> mmr = {}
>>> for k, seq in mm.items():
... for elem in seq:
... mmr.setdefault(elem, []).append(k)
>>> mmr
{'A': ['a', 'b'], 'C': ['a', 'c'], 'B': ['a'], 'E': ['c'], 'D': ['c',
'b']}
> What about using some
> Serialized objects?
from pickle import loads, dumps
d = dict(a=dumps(someobj), b=dumps(anotherobj))
obj = loads(d['a'])
Raymond
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