def test_table_resource():
with tmpfile('csv') as filename:
ds = dshape('var * {a: int, b: int}')
csv = CSV(filename)
append(csv, [[1, 2], [10, 20]], dshape=ds)
t = Data(filename)
assert isinstance(t.data, CSV)
assert into(list, compute(t)) == into(list, csv)
def test_table_resource():
with tmpfile('csv') as filename:
ds = dshape('var * {a: int, b: int}')
csv = CSV(filename)
append(csv, [[1, 2], [10, 20]], dshape=ds)
t = Data(filename)
assert isinstance(t.data, CSV)
assert into(list, compute(t)) == into(list, csv)
def test_append_sas_to_sqlite_round_trip():
expected = convert(set, sasfile)
with tmpfile('db') as fn:
r = resource('sqlite:///%s::SAS' % fn, dshape=discover(sasfile))
append(r, sasfile)
result = convert(set, r)
assert expected == result
def test_append_sas_to_sqlite_round_trip():
expected = convert(set, sasfile)
with tmpfile('db') as fn:
r = resource('sqlite:///%s::SAS' % fn, dshape=discover(sasfile))
append(r, sasfile)
result = convert(set, r)
assert expected == result
def test_append_and_convert_round_trip():
engine = sa.create_engine('sqlite:///:memory:')
metadata = sa.MetaData(engine)
t = sa.Table('bank', metadata,
sa.Column('name', sa.String, primary_key=True),
sa.Column('balance', sa.Integer))
t.create()
data = [('Alice', 1), ('Bob', 2)]
append(t, data)
assert convert(list, t) == data
def test_into_table_iterator():
engine = sa.create_engine('sqlite:///:memory:')
metadata = sa.MetaData(engine)
t = dshape_to_table('points', '{x: int, y: int}', metadata=metadata)
t.create()
data = [(1, 1), (2, 4), (3, 9)]
append(t, data)
assert convert(list, t) == data
t2 = dshape_to_table('points2', '{x: int, y: int}', metadata=metadata)
t2.create()
data2 = [{'x': 1, 'y': 1}, {'x': 2, 'y': 4}, {'x': 3, 'y': 9}]
append(t2, data2)
assert convert(list, t2) == data
def test_select_to_iterator():
engine, t = single_table_engine()
append(t, [('Alice', 100), ('Bob', 200)])
sel = sa.select([t.c.amount + 1])
assert convert(list, sel) == [(101,), (201,)]
assert convert(list, sel, dshape=dshape('var * int')) == [101, 201]
sel2 = sa.select([sa.sql.func.sum(t.c.amount)])
assert convert(int, sel2, dshape=dshape('int')) == 300
sel3 = sa.select([t])
result = convert(list, sel3, dshape=discover(t))
assert type(result[0]) is tuple
def test_append_from_select(sqlite_file):
# we can't test in memory here because that creates two independent
# databases
raw = np.array([(200.0, 'Glenn'),
(314.14, 'Hope'),
(235.43, 'Bob')], dtype=[('amount', 'float64'),
('name', 'S5')])
raw2 = np.array([(800.0, 'Joe'),
(914.14, 'Alice'),
(1235.43, 'Ratso')], dtype=[('amount', 'float64'),
('name', 'S5')])
t = into('%s::t' % sqlite_file, raw)
s = into('%s::s' % sqlite_file, raw2)
t = append(t, s.select())
result = into(list, t)
expected = np.concatenate((raw, raw2)).tolist()
assert result == expected
def test_append():
with file(df) as (fn, f, dset):
append(dset, df)
append(dset, df)
assert discover(dset).shape == (len(df) * 3,)
def test_append_chunks():
with file(df) as (fn, f, dset):
append(dset, chunks(pd.DataFrame)([df, df]))
assert discover(dset).shape[0] == len(df) * 3
def test_sql_field_names_disagree_on_names():
r = resource('sqlite:///:memory:::tb', dshape=dshape('{x: int, y: int}'))
assert raises(Exception, lambda: append(r, [(1, 2), (10, 20)],
dshape=dshape('{x: int, z: int}')))
def test_sql_field_names_disagree_on_order():
r = resource('sqlite:///:memory:::tb', dshape=dshape('{x: int, y: int}'))
append(r, [(1, 2), (10, 20)], dshape=dshape('{y: int, x: int}'))
assert convert(set, r) == set([(2, 1), (20, 10)])
def test_extend_empty():
engine, t = single_table_engine()
assert not convert(list, t)
append(t, [])
assert not convert(list, t)
def test_append():
with file(df) as (fn, f, dset):
append(dset, df)
append(dset, df)
assert discover(dset).shape == (len(df) * 3, )
def test_append_chunks():
with file(df) as (fn, f, dset):
append(dset, chunks(pd.DataFrame)([df, df]))
assert discover(dset).shape[0] == len(df) * 3
def test_append_convert():
with coll([]) as c:
append(c, bank, dshape=ds)
assert convert(list, c,
dshape=ds) == list(pluck(['name', 'amount'], bank))