def __call__(self, f):
"""Return decorated version of f."""
from sage.misc.function_mangling import ArgumentFixer
A = ArgumentFixer(f)
def g(*args, **kwds):
k = A.fix_to_named(*args, **kwds)
try:
return self.db[k]
except KeyError:
pass
x = self.db[k] = f(*args, **kwds)
self.db.commit()
return x
def keys():
return self.db.keys()
g.keys = keys
g.db = self.db
return g
def __init__(self, inst, f, name=None, **options):
r"""
Initialize ``self``.
TESTS::
sage: from sage.sets.set_from_iterator import DummyExampleForPicklingTest
sage: d = DummyExampleForPicklingTest()
sage: d.f()
{10, 11, 12, 13, 14, ...}
It is possible to pickle/unpickle the class and the instance::
sage: loads(dumps(DummyExampleForPicklingTest))().f()
{10, 11, 12, 13, 14, ...}
sage: loads(dumps(d)).f()
{10, 11, 12, 13, 14, ...}
But not the enumerated set::
sage: loads(dumps(d.f())) # py2
Traceback (most recent call last):
...
PicklingError: Can't pickle <... 'function'>: attribute lookup __builtin__.function failed
sage: loads(dumps(d.f())) # py3
Traceback (most recent call last):
...
_pickle.PicklingError: Can't pickle <function DummyExampleForPicklingTest.f at ...>: it's not the same object as sage.sets.set_from_iterator.DummyExampleForPicklingTest.f
"""
self.inst = inst
self.f = f
self.af = ArgumentFixer(self.f)
if hasattr(f, "__name__"):
self.__name__ = f.__name__
else:
self.__name__ = f.__name__
self.__module__ = f.__module__
self.name = name
self.options = options
def __init__(self, f=None, name=None, **options):
r"""
Initialize ``self``.
TESTS::
sage: from sage.sets.set_from_iterator import set_from_function
sage: F = set_from_function(category=FiniteEnumeratedSets())(xsrange)
sage: TestSuite(F(100)).run()
sage: TestSuite(F(1,5,2)).run()
sage: TestSuite(F(0)).run()
"""
if f is not None:
self.f = f
if hasattr(f, "__name__"):
self.__name__ = f.__name__
else:
self.__name__ = f.__name__
self.__module__ = f.__module__
self.af = ArgumentFixer(f)
if name is not None:
self.name = name
self.options = options
