def test_save_view(tempdir):
dt0 = dt.Frame([4, 0, -2, 3, 17, 2, 0, 1, 5], names=["fancy"])
dt1 = dt0.sort(0)
assert dt1.internal.isview
dt.save(dt1, tempdir)
dt2 = dt.open(tempdir)
assert not dt2.internal.isview
assert dt2.names == dt1.names
assert dt2.topython() == dt1.topython()
def test_issue689(tempdir):
n = 300000 # Must be > 65536
data = [i % 8 for i in range(n)]
d0 = dt.Frame(data, names=["A"])
dt.save(d0, tempdir)
del d0
d1 = dt.open(tempdir)
# Do not check d1! we want it to be lazy at this point
d2 = d1(rows=lambda g: g[0] == 1)
assert d2.internal.check()
assert d2.shape == (n / 8, 1)
def test_rbind_mmapped():
dir0 = tempfile.mkdtemp()
dt0 = dt.Frame({"A": [1, 5, 7], "B": ["one", "two", None]})
dt.save(dt0, dir0)
del dt0
dt1 = dt.open(dir0)
dt2 = dt.Frame({"A": [-1], "B": ["zero"]})
dt1.rbind(dt2)
dtr = dt.Frame({"A": [1, 5, 7, -1], "B": ["one", "two", None, "zero"]})
assert_equals(dt1, dtr)
shutil.rmtree(dir0)
