def test_remove():
r = remove(iseven, range(5))
assert type(r) is not list
assert list(r) == list(filter(isodd, range(5)))
def test_map_filter_are_lazy():
def bad(x):
raise Exception()
map(bad, [1, 2, 3])
filter(bad, [1, 2, 3])
def test_remove():
r = remove(iseven, range(5))
assert type(r) is not list
assert list(r) == list(filter(isodd, range(5)))
def test_map_filter_are_lazy():
def bad(x):
raise Exception()
map(bad, [1, 2, 3])
filter(bad, [1, 2, 3])
