def __init__(self, f, args=None, kwds=None, name=None, category=None, cache=False):
"""
TESTS::
sage: from sage.sets.set_from_iterator import EnumeratedSetFromIterator
sage: S = EnumeratedSetFromIterator(xsrange, (1,200,-1), category=FiniteEnumeratedSets())
sage: TestSuite(S).run()
"""
if category is not None:
Parent.__init__(self, facade = True, category = category)
else:
Parent.__init__(self, facade = True, category = EnumeratedSets())
if name is not None:
self.rename(name)
self._func = f
if args is not None:
self._args = args
if kwds is not None:
self._kwds = kwds
if cache:
self._cache = lazy_list(iter(self._func(
*getattr(self, '_args', ()),
**getattr(self, '_kwds', {}))))
def __init__(self, f, args=None, kwds=None, name=None, category=None, cache=False):
"""
TESTS::
sage: from sage.sets.set_from_iterator import EnumeratedSetFromIterator
sage: S = EnumeratedSetFromIterator(xsrange, (1,200,-1), category=FiniteEnumeratedSets())
sage: TestSuite(S).run()
"""
if category is not None:
Parent.__init__(self, facade = True, category = category)
else:
Parent.__init__(self, facade = True, category = EnumeratedSets())
if name is not None:
self.rename(name)
self._func = f
if args is not None:
self._args = args
if kwds is not None:
self._kwds = kwds
if cache:
self._cache = lazy_list(iter(self._func(
*getattr(self, '_args', ()),
**getattr(self, '_kwds', {}))))
def clear_cache(self):
r"""
Clear the cache.
EXAMPLES::
sage: from itertools import count
sage: from sage.sets.set_from_iterator import EnumeratedSetFromIterator
sage: E = EnumeratedSetFromIterator(count, args=(1,), cache=True)
sage: e1 = E._cache
sage: e1
lazy list [1, 2, 3, ...]
sage: E.clear_cache()
sage: E._cache
lazy list [1, 2, 3, ...]
sage: e1 is E._cache
False
"""
if hasattr(self, "_cache"):
self._cache = lazy_list(iter(self._func(*getattr(self, "_args", ()), **getattr(self, "_kwds", {}))))
def clear_cache(self):
r"""
Clear the cache.
EXAMPLES::
sage: from itertools import count
sage: from sage.sets.set_from_iterator import EnumeratedSetFromIterator
sage: E = EnumeratedSetFromIterator(count, args=(1,), cache=True)
sage: e1 = E._cache
sage: e1
lazy list [1, 2, 3, ...]
sage: E.clear_cache()
sage: E._cache
lazy list [1, 2, 3, ...]
sage: e1 is E._cache
False
"""
if hasattr(self, '_cache'):
self._cache = lazy_list(iter(self._func(
*getattr(self, '_args', ()),
**getattr(self, '_kwds', {}))))