def test_unhashable():
'''Test `SleekCallArgs` on unhashable arguments.'''
sca_dict = {}
args = ([1, 2], {1: [1, 2]}, set(('a', 1)))
sca1 = SleekCallArgs(sca_dict, f, *args)
hash(sca1)
sca_dict[sca1] = 'meow'
del args
gc_tools.collect()
# GCed because there's a `set` in `args`, and it's weakreffable:
assert len(sca_dict) == 0
kwargs = {
'a': {1: 2},
'b': [
set(),
set((frozenset((3, 4))))
]
}
sca2 = SleekCallArgs(sca_dict, f, **kwargs)
hash(sca2)
sca_dict[sca2] = 'meow'
del kwargs
gc_tools.collect()
# Not GCed because all objects in `kwargs` are not weakreffable:
assert len(sca_dict) == 1
def test():
'''Test the basic workings of `SleekCallArgs`.'''
sca_dict = {}
args = (1, 2)
sca1 = SleekCallArgs(sca_dict, f, *args)
sca_dict[sca1] = 'meow'
del args
gc_tools.collect()
assert len(sca_dict) == 1
args = (1, A())
sca2 = SleekCallArgs(sca_dict, f, *args)
sca_dict[sca2] = 'meow'
del args
gc_tools.collect()
assert len(sca_dict) == 1
def cached(function, *args, **kwargs):
sleek_call_args = \
SleekCallArgs(cached._cache, function, *args, **kwargs)
try:
return cached._cache[sleek_call_args]
except KeyError:
cached._cache[sleek_call_args] = value = \
function(*args, **kwargs)
return value
def __call__(cls, *args, **kwargs):
sleek_call_args = SleekCallArgs(cls.__cache, cls.__init__,
*((SelfPlaceholder, ) + args),
**kwargs)
try:
return cls.__cache[sleek_call_args]
except KeyError:
cls.__cache[sleek_call_args] = value = \
super().__call__(*args, **kwargs)
return value
def cached(function, *args, **kwargs):
remove_expired_entries()
sleek_call_args = \
SleekCallArgs(cached._cache, function, *args, **kwargs)
try:
return cached._cache[sleek_call_args][0]
except KeyError:
value = function(*args, **kwargs)
cached._cache[sleek_call_args] = (value, _get_now() +
time_to_keep)
cached._cache.sort(key=sorting_key_function)
return value
def cached(function, *args, **kwargs):
sleek_call_args = \
SleekCallArgs(cached._cache, function, *args, **kwargs)
try:
result = cached._cache[sleek_call_args]
cached._cache.move_to_end(sleek_call_args)
return result
except KeyError:
cached._cache[sleek_call_args] = value = \
function(*args, **kwargs)
if len(cached._cache) > max_size:
cached._cache.popitem(last=False)
return value
