def test_node_discover(self, dt_tb):
root = PyTables(dt_tb, '/')
result = discover(root)
expected = ds.dshape("""{dt: 5 * {id: int64,
name: string[7, "A"],
amount: float64,
date: float64}}""")
assert result == expected.measure
def test_table_into_ndarray(self, dt_tb):
t = PyTables(dt_tb, '/dt')
res = into(np.ndarray, t)
try:
for k in res.dtype.fields:
lhs, rhs = res[k], dt_data[k]
if (issubclass(np.datetime64, lhs.dtype.type) and
issubclass(np.datetime64, rhs.dtype.type)):
lhs, rhs = lhs.astype('M8[us]'), rhs.astype('M8[us]')
assert np.array_equal(lhs, rhs)
finally:
t._v_file.close()
def test_ndarray_into_table(self, dt_tb):
dtype = ds.from_numpy(dt_data.shape, dt_data.dtype)
t = PyTables(dt_tb, '/out', dtype)
try:
res = into(np.ndarray, into(t, dt_data, filename=dt_tb, datapath='/out'))
for k in res.dtype.fields:
lhs, rhs = res[k], dt_data[k]
if (issubclass(np.datetime64, lhs.dtype.type) and
issubclass(np.datetime64, rhs.dtype.type)):
lhs, rhs = lhs.astype('M8[us]'), rhs.astype('M8[us]')
assert np.array_equal(lhs, rhs)
finally:
t._v_file.close()
def test_write_with_dshape(self, tbfile):
f = tb.open_file(tbfile, mode='a')
try:
assert '/write_this' not in f
finally:
f.close()
del f
# create our table
dshape = '{id: int, name: string[7, "ascii"], amount: float32}'
t = PyTables(path=tbfile, datapath='/write_this', dshape=dshape)
shape = t.shape
filename = t._v_file.filename
t._v_file.close()
assert filename == tbfile
assert shape == (0,)
def test_write_no_dshape(self, tbfile):
with pytest.raises(ValueError):
PyTables(path=tbfile, datapath='/write_this')
def test_read(self, tbfile):
t = PyTables(path=tbfile, datapath='/title')
shape = t.shape
t._v_file.close()
assert shape == (5,)
def test_datetime_discovery(self, dt_tb):
t = PyTables(dt_tb, '/dt')
lhs, rhs = map(discover, (t, dt_data))
t._v_file.close()
assert lhs == rhs