def zip(self) -> None:
a = 1
b = 2
ab = (a, b)
l1 = LazyList((a, a, a, a), chunk_size=1)
l2 = LazyList((b, b, b, b), chunk_size=1)
l1[1]
z = l1.zip(l2)
z.strict.should.equal(List(ab, ab))
z.drain.should.equal(List(ab, ab, ab, ab))
def episode_enumeration_match(filename):
custom_rex = ConfigClient('series')('enumeration_regex')
if custom_rex:
return re.search(custom_rex, str(filename))
else:
if isinstance(filename, Path):
filename = filename.name
searcher = lambda s: re.search(s, filename, re.I)
rex = LazyList(map(searcher, regexes))
return rex.find(lambda a: a) | None
def search(self, monitor):
return (
LazyList(self._queries(monitor))
.filter(_.valid)
.apzip(self._safe_search)
.map2(L(SearchResults)(_, _, self.min_seeders, self.max_size))
)
def collect(self) -> None:
def f(a: int, n: str) -> Maybe[str]:
return Just(n) if a % 2 == 0 else Nothing
l: LazyList = LazyList((a, str(a)) for a in range(10))
l2 = l.collect(tupled2(f))
l2.drain.should.equal(List('0', '2', '4', '6', '8'))
def zip(self, fa: LazyList[A], fb: LazyList[B], *fs) -> LazyList:
fss = (fa, fb) + fs
maxlen = max(map(lambda a: len(a.strict), fss))
for f in fss:
f._fetch(maxlen - 1)
stricts = map(_.strict, fss)
strict = ListZip().zip(*stricts)
return LazyList(self._zip(fss), init=strict)
def slice_finite(self) -> None:
l = LazyList(range(30), chunk_size=20)
l[:15].should.have.length_of(15)
l.strict.should.have.length_of(20)
l[:20].should.have.length_of(20)
l.strict.should.have.length_of(20)
l[:21].should.have.length_of(21)
l.strict.should.have.length_of(30)
def slice_infinite(self) -> None:
l = LazyList(itertools.count(), chunk_size=20)
l[:15].should.have.length_of(15)
l.strict.should.have.length_of(20)
l[:20].should.have.length_of(20)
l.strict.should.have.length_of(20)
l[:21].should.have.length_of(21)
l.strict.should.have.length_of(40)
def flat_map(self, fa: LazyList[A],
f: Callable[[A], LazyList[B]]) -> LazyList[B]:
a, b = itertools.tee(fa.source)
fa.source = a
strict_m = fa.strict.map(f)
lazy_m = map(f, b)
mapped = itertools.chain(strict_m, lazy_m)
source = itertools.chain.from_iterable(mapped)
return LazyList(source, List(), fa._chunk_size)
def filter(self) -> None:
l = LazyList(range(30))
l2 = l.filter(_ % 2 == 0)
l2.strict.should.have.length_of(0)
l3 = LazyList(range(30))
l3[29]
l4 = l3.filter(_ % 2 == 0)
l4.strict.should.have.length_of(15)
l4.drain.should.equal(List.wrap(range(0, 30, 2)))
def apzip(self) -> None:
l = LazyList((1, 2, 3), chunk_size=1)
l[0]
z = l.apzip(_ + 2)
z.drain.should.equal(List((1, 3), (2, 4), (3, 5)))
def traverse_task(self) -> None:
n = 3
l = LazyList(range(n))
result = l.traverse(Task.now, Task).attempt / _.drain
result.should.contain(l.drain)
def sequence(self) -> None:
n = 3
l = LazyList(map(Just, range(n)))
target = LazyList(List.wrap(range(n)))
(l.sequence(Maybe) / _.drain).should.contain(target.drain)
def traverse_io(self) -> None:
n = 3
l = LazyList(range(n))
result = l.traverse(IO.now, IO).attempt / _.drain
result.should.contain(l.drain)
def find(self) -> None:
l = LazyList(range(30), chunk_size=20)
l.find(_ == 21).should.contain(21)
l.find(_ == 49).should.be.empty
def index_of(self) -> None:
l = LazyList(range(30), chunk_size=20)
l.index_of(21).should.contain(21)
l.index_of(49).should.be.empty
def with_index(self) -> None:
l = LazyList(itertools.count(), chunk_size=20)
l2 = l.map(_ * 5).with_index
l2[:2].should.equal(List((0, 0), (1, 5)))
def map(self) -> None:
l = LazyList(itertools.count(), chunk_size=20)
l.lift(5)
l2 = l.map(_ * 10)
l2[:5].should.equal(List.wrap(range(0, 50, 10)))
def single(self) -> None:
l = LazyList(range(30), chunk_size=20)
l[19].should.equal(19)
l.strict.should.have.length_of(20)
l[20].should.equal(20)
l.strict.should.have.length_of(30)
def pure(self, a: A):
return LazyList([], List(a))
def deep(self) -> None:
n = int(1e4)
l = LazyList(List.wrap(range(n)))
l.index_of(n - 1).should.contain(n - 1)
def with_index(self, fa: LazyList[A]) -> List[Tuple[int, A]]:
return LazyList(enumerate(fa.source), fa.strict, fa._chunk_size)
def nodes(*s: Tuple[Data, Callable[[RoseTree[Data]], RoseTree[Data]]]
) -> Callable[[RoseTree[Data]], LazyList[RoseTree[Data]]]:
return lambda parent: LazyList(s).map2(node).map(lambda f: f(parent))
def sub_l(self) -> LazyList[Node[Data, Any]]:
return LazyList([])
def flat_map(self) -> None:
l = LazyLists.cons(LazyList((1, 2, 3)), LazyList((4, 5, 6)),
LazyList((1, 2, 3)))
l.lift(1)
l.flat_map(I).drain.should.equal(List(1, 2, 3, 4, 5, 6, 1, 2, 3))
def leaves(*data: Data) -> Callable[[RoseTree[Data]], LazyList[RoseTree[Data]]]:
return lambda parent: LazyList(data).map(leaf).map(lambda f: f(parent))
def fold_left(self) -> None:
LazyList((1, 2, 3)).fold_left('')(lambda a, b: str(b) + a)\
.should.equal('321')
def strings(self) -> LazyList[str]:
return LazyList([])
def fold_map(self) -> None:
LazyList((1, 2, 3)).fold_map(5, _ * 2).should.equal(17)