[EMAIL PROTECTED] wrote:
> Dicts and sets require immutable keys, like tuples or frozensets
Not really...
def freeze(anobj):
"""returns a new hashable object"""
import copy
try: hash(anobj)
except: pass
else: return copy.deepcopy(anobj)
class FrozenType(type):
def __new__(cls, name, bases, dct):
return type.__new__(cls, name, bases, dct)
def __init__(cls, name, bases, dct):
super(FrozenType, cls).__init__(name, bases, dct)
def hashself(self): return hash(repr(self))
name = 'Frozen_%s' % anobj.__class__.__name__
bases = (anobj.__class__,)
dct = dict(anobj.__class__.__dict__)
dct['__hash__'] = hashself
cls = FrozenType(name, bases, dct)
return cls(anobj)
def test():
class bob:
def doit(self): print 1,2,3,4
# amutable = bob()
# amutable = [1,2,3,4]
amutable = set((1,2,3,4))
# amutable = {1:2, 3:4}
frozen = freeze(amutable)
print frozen
print type(frozen)
adict = {frozen:100}
frozen2 = freeze(amutable)
print adict[frozen2]
print frozen is frozen2
print frozen == frozen2
test()
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