def test_write_constraint():
"""'constraint' argument to writer.write_dataset."""
with specimen("ng-ts.xml") as f:
msg = pandasdmx.read_sdmx(f)
# Fetch the message's DSD
assert msg.structure.is_external_reference
# NB the speciment included in tests/data has 'ECB_EXR_NG' as the
# data structure ID; but a query against the web service gives
# 'ECB_EXR1' for the same data structure.
id = "ECB_EXR1"
dsd = (
pandasdmx.Request(msg.structure.maintainer.id)
.get("datastructure", id)
.structure[id]
)
# Create a ContentConstraint
cc = dsd.make_constraint({"CURRENCY": "JPY+USD"})
# Write the message without constraint
s1 = pandasdmx.to_pandas(msg)
assert len(s1) == 12
assert set(s1.index.to_frame()["CURRENCY"]) == {"CHF", "GBP", "JPY", "USD"}
# Writing using constraint produces a fewer items; only those matching the
# constraint
s2 = pandasdmx.to_pandas(msg, constraint=cc)
assert len(s2) == 6
assert set(s2.index.to_frame()["CURRENCY"]) == {"JPY", "USD"}
def test_freq_in_series_attribute(self, req):
# Test that we don't have regression on Issues #39 and #41
# INSEE time series provide the FREQ value as attribute on the series
# instead of a dimension. This caused a runtime error when writing as
# pandas dataframe.
data_response = pandasdmx.read_sdmx(SERIES["UNEMPLOYMENT_CAT_A_B_C"]["data-fp"])
pandasdmx.to_pandas(data_response)
def test_write_codelist():
# Retrieve codelists from a test specimen and convert to pandas
with specimen('common-structure.xml') as f:
dsd_common = sdmx.read_sdmx(f)
codelists = sdmx.to_pandas(dsd_common)['codelist']
# File contains 5 code lists
assert len(codelists) == 5
# Code lists have expected number of items
assert len(codelists['CL_FREQ']) == 8
# Items names can be retrieved by ID
freq = codelists['CL_FREQ']
assert freq['A'] == 'Annual'
# Non-hierarchical code list has a string name
assert freq.name == 'Code list for Frequency (FREQ)'
# Hierarchical code list
with specimen('codelist_partial.xml') as f:
msg = sdmx.read_sdmx(f)
# Convert single codelist
CL_AREA = sdmx.to_pandas(msg.codelist['CL_AREA'])
# Hierichical list has a 'parent' column; parent of Africa is the World
assert CL_AREA.loc['002', 'parent'] == '001'
# Pandas features can be used to merge parent names
area_hierarchy = pd.merge(CL_AREA, CL_AREA,
how='left', left_on='parent', right_index=True,
suffixes=('', '_parent'))
assert area_hierarchy.loc['002', 'name_parent'] == 'World'
def test_write_constraint():
"""'constraint' argument to writer.write_dataset."""
with specimen('ng-ts.xml') as f:
msg = sdmx.read_sdmx(f)
# Fetch the message's DSD
assert msg.structure.is_external_reference
# NB the speciment included in tests/data has 'ECB_EXR_NG' as the
# data structure ID; but a query against the web service gives
# 'ECB_EXR1' for the same data structure.
id = 'ECB_EXR1'
dsd = sdmx.Request(msg.structure.maintainer.id) \
.get('datastructure', id) \
.structure[id]
# Create a ContentConstraint
cc = dsd.make_constraint({'CURRENCY': 'JPY+USD'})
# Write the message without constraint
s1 = sdmx.to_pandas(msg)
assert len(s1) == 12
assert set(s1.index.to_frame()['CURRENCY']) == {'CHF', 'GBP', 'JPY', 'USD'}
# Writing using constraint produces a fewer items; only those matching the
# constraint
s2 = sdmx.to_pandas(msg, constraint=cc)
assert len(s2) == 6
assert set(s2.index.to_frame()['CURRENCY']) == {'JPY', 'USD'}
def test_write2pandas(self, msg):
df = pandasdmx.to_pandas(msg, attributes="")
assert isinstance(df, pd.Series)
assert df.shape == (12,)
# with metadata
df = pandasdmx.to_pandas(msg, attributes="osgd")
assert df.shape == (12, 8)
assert df.iloc[1].OBS_STATUS == "A"
def test_write_data_arguments():
msg = sdmx.read_sdmx(test_files(kind='data')['argvalues'][0])
# Attributes must be a string
with raises(TypeError):
sdmx.to_pandas(msg, attributes=2)
# Attributes must contain only 'dgso'
with raises(ValueError):
sdmx.to_pandas(msg, attributes='foobarbaz')
def test_to_pandas(self, msg):
# Single data series is converted to pd.Series
data_series = sdmx.to_pandas(msg.data[0])
assert isinstance(data_series, pd.Series)
# When len(msg.data) is 1, the data series in a single Dataset are
# unwrapped automatically
assert len(msg.data) == 1
data_series2 = sdmx.to_pandas(msg.data) # NB no '[0]' index
pdt.assert_series_equal(data_series, data_series2)
def test_write_data_arguments():
msg = pandasdmx.read_sdmx(test_files(kind="data")["argvalues"][0])
# Attributes must be a string
with raises(TypeError):
pandasdmx.to_pandas(msg, attributes=2)
# Attributes must contain only 'dgso'
with raises(ValueError):
pandasdmx.to_pandas(msg, attributes="foobarbaz")
def test_write2pandas(self, msg):
df = sdmx.to_pandas(msg, attributes='')
assert isinstance(df, pd.Series)
assert df.shape == (12, )
# with metadata
df = sdmx.to_pandas(msg, attributes='osgd')
df, mdf = df.iloc[:, 0], df.iloc[:, 1:]
assert mdf.shape == (12, 7)
assert mdf.iloc[1].OBS_STATUS == 'A'
def test_endpoints(self, req, endpoint, args):
# See pytest_generate_tests() for values of 'endpoint'
cache = self._cache_path.with_suffix(f".{endpoint}.xml")
result = req.get(endpoint, tofile=cache, **args)
# For debugging
# print(cache, cache.read_text(), result, sep='\n\n')
# assert False
pandasdmx.to_pandas(result)
del result
def test_exr_constraints():
with specimen("1/structure-full.xml") as f:
m = pandasdmx.read_sdmx(f)
ECB_EXR1 = m.structure["ECB_EXR1"]
# Test DimensionDescriptor
dd = ECB_EXR1.dimensions
# Correct order
assert dd[0].id == "FREQ"
# Correct number of dimensions
assert len(dd.components) == 6
# Dimensions can be retrieved by name; membership can be tested
assert "W" in dd.get("FREQ")
# Similar tests for AttributeDescriptor
ad = ECB_EXR1.attributes
assert len(ad.components) == 24
assert ad[-1].id == "UNIT_MULT"
assert "5" in ad.get("UNIT_MULT")
pytest.xfail("constrained codes not implemented")
assert len(m._constrained_codes), 14
assert "W" not in m._constrained_codes.FREQ
key = {"FREQ": ["W"]}
assert m.in_codes(key)
assert not m.in_constraints(key, raise_error=False)
with pytest.raises(ValueError):
m.in_constraints(key)
assert m.in_constraints({"CURRENCY": ["CHF"]})
# test with invalid key
with pytest.raises(TypeError):
m._in_constraints({"FREQ": "A"})
# structure writer with constraints
out = pandasdmx.to_pandas(m)
cl = out.codelist
assert cl.shape == (3555, 2)
# unconstrained codelists
out = pandasdmx.to_pandas(m, constraint=False)
cl = out.codelist
assert cl.shape, (4177, 2)
def test_exr_constraints():
with specimen('1/structure-full.xml') as f:
m = sdmx.read_sdmx(f)
ECB_EXR1 = m.structure['ECB_EXR1']
# Test DimensionDescriptor
dd = ECB_EXR1.dimensions
# Correct order
assert dd[0].id == 'FREQ'
# Correct number of dimensions
assert len(dd.components) == 6
# Dimensions can be retrieved by name; membership can be tested
assert 'W' in dd.get('FREQ')
# Similar tests for AttributeDescriptor
ad = ECB_EXR1.attributes
assert len(ad.components) == 24
assert ad[-1].id == 'UNIT_MULT'
assert '5' in ad.get('UNIT_MULT')
pytest.xfail('constrained codes not implemented') # TODO
assert len(m._constrained_codes), 14
assert 'W' not in m._constrained_codes.FREQ
key = {'FREQ': ['W']}
assert m.in_codes(key)
assert not m.in_constraints(key, raise_error=False)
with pytest.raises(ValueError):
m.in_constraints(key)
assert m.in_constraints({'CURRENCY': ['CHF']})
# test with invalid key
with pytest.raises(TypeError):
m._in_constraints({'FREQ': 'A'})
# structure writer with constraints
out = sdmx.to_pandas(m)
cl = out.codelist
assert cl.shape == (3555, 2)
# unconstrained codelists
out = sdmx.to_pandas(m, constraint=False)
cl = out.codelist
assert cl.shape, (4177, 2)
def test_flat():
# Create a bare Message
msg = DataMessage()
# Recreate the content from exr-flat.json
header = Header(
id="62b5f19d-f1c9-495d-8446-a3661ed24753",
prepared="2012-11-29T08:40:26Z",
sender=model.Agency(id="ECB"),
)
msg.header = header
ds = DataSet()
# Create a Key and attributes
key = Key(
FREQ="D",
CURRENCY="NZD",
CURRENCY_DENOM="EUR",
EXR_TYPE="SP00",
EXR_SUFFIX="A",
TIME_PERIOD="2013-01-18",
)
obs_status = DataAttribute(id="OBS_STATUS")
attr = {"OBS_STATUS": AttributeValue(value_for=obs_status, value="A")}
ds.obs.append(
Observation(dimension=key, value=1.5931, attached_attribute=attr))
key = key.copy(TIME_PERIOD="2013-01-21")
ds.obs.append(
Observation(dimension=key, value=1.5925, attached_attribute=attr))
key = key.copy(CURRENCY="RUB", TIME_PERIOD="2013-01-18")
ds.obs.append(
Observation(dimension=key, value=40.3426, attached_attribute=attr))
key = key.copy(TIME_PERIOD="2013-01-21")
ds.obs.append(
Observation(dimension=key, value=40.3000, attached_attribute=attr))
msg.data.append(ds)
# Write to pd.Dataframe
df1 = pandasdmx.to_pandas(msg)
with specimen("flat.json") as f:
ref = pandasdmx.read_sdmx(f)
df2 = pandasdmx.to_pandas(ref)
assert_pd_equal(df1, df2)
def test_flat():
# Create a bare Message
msg = DataMessage()
# Recreate the content from exr-flat.json
header = Header(
id='62b5f19d-f1c9-495d-8446-a3661ed24753',
prepared='2012-11-29T08:40:26Z',
sender='ECB',
)
msg.header = header
ds = DataSet()
# Create a Key and attributes
key = Key(FREQ='D',
CURRENCY='NZD',
CURRENCY_DENOM='EUR',
EXR_TYPE='SP00',
EXR_SUFFIX='A',
TIME_PERIOD='2013-01-18')
obs_status = DataAttribute(id='OBS_STATUS')
attr = {'OBS_STATUS': AttributeValue(value_for=obs_status, value='A')}
ds.obs.append(
Observation(dimension=key, value=1.5931, attached_attribute=attr))
key = key.copy(TIME_PERIOD='2013-01-21')
ds.obs.append(
Observation(dimension=key, value=1.5925, attached_attribute=attr))
key = key.copy(CURRENCY='RUB', TIME_PERIOD='2013-01-18')
ds.obs.append(
Observation(dimension=key, value=40.3426, attached_attribute=attr))
key = key.copy(TIME_PERIOD='2013-01-21')
ds.obs.append(
Observation(dimension=key, value=40.3000, attached_attribute=attr))
msg.data.append(ds)
# Write to pd.Dataframe
df1 = sdmx.to_pandas(msg)
with specimen('flat.json') as f:
ref = sdmx.read_sdmx(f)
df2 = sdmx.to_pandas(ref)
assert_pd_equal(df1, df2)
def test_doc_index1():
"""First code example in index.rst."""
estat = Request('ESTAT')
flow_response = estat.dataflow('une_rt_a')
with pytest.raises(TypeError):
# This presumes the DataStructureDefinition instance can conduct a
# network request for its own content
structure_response = flow_response.dataflow.une_rt_a.structure(
request=True, target_only=False)
# Same effect
structure_response = estat.get(
'datastructure', flow_response.dataflow.une_rt_a.structure.id)
# Even better: Request.get(…) should examine the class and ID of the object
# structure = estat.get(flow_response.dataflow.une_rt_a.structure)
# Show some codelists
s = sdmx.to_pandas(structure_response)
expected = pd.Series({
'AT': 'Austria',
'BE': 'Belgium',
'BG': 'Bulgaria',
'CH': 'Switzerland',
'CY': 'Cyprus',
}, name='GEO') \
.rename_axis('CL_GEO')
# Codelists are converted to a DictLike
assert isinstance(s.codelist, DictLike)
# Same effect
assert_pd_equal(s.codelist['CL_GEO'].sort_index().head(), expected)
def test_write_dataflow():
# Read the INSEE dataflow definition
with specimen('INSEE/dataflow') as f:
msg = sdmx.read_sdmx(f)
# Convert to pandas
result = sdmx.to_pandas(msg, include='dataflow')
# Number of Dataflows described in the file
assert len(result['dataflow']) == 663
# ID and names of first Dataflows
mbop = 'Monthly Balance of Payments - '
expected = pd.Series({
'ACT-TRIM-ANC':
'Activity by sex and age - Quarterly series',
'BPM6-CCAPITAL':
'{}Capital account'.format(mbop),
'BPM6-CFINANCIER':
'{}Financial account'.format(mbop),
'BPM6-CTRANSACTION':
'{}Current transactions account'.format(mbop),
'BPM6-TOTAL':
'{}Overall total and main headings'.format(mbop),
})
assert_pd_equal(result['dataflow'].head(), expected)
def _get_dimensions_1(structure_message):
# pandasdmx v1
(dsd, ) = structure_message.structure.values() # unpack exactly 1 table
dimension_names = pandasdmx.to_pandas(dsd.dimensions)
codelist = pandasdmx.to_pandas(structure_message.codelist)
dimension_items = {
name.lower(): codelist[f"CL_{name}"]
for name in dimension_names if name not in _EXCLUDED_DIMENSIONS
}
dimensions = (pd.concat(dimension_items).rename_axis(
["dimension", "code"]).rename("label").to_frame())
return dimensions
def test_doc_usage_data():
"""Code examples in usage.rst."""
ecb = Request('ECB')
data_response = ecb.data(resource_id='EXR', key={'CURRENCY': 'USD+JPY'},
params={'startPeriod': '2016',
'endPeriod': '2016-12-31'})
# # Commented: do the same without triggering requests for validation
# data_response = ecb.data(resource_id='EXR', key='.JPY+USD...',
# params={'startPeriod': '2016',
# 'endPeriod': '2016-12-31'})
data = data_response.data[0]
assert type(data) is DataSet
# This message doesn't explicitly specify the remaining dimensions; unless
# they are inferred from the SeriesKeys, then the DimensionDescriptor is
# not complete
# assert data.structured_by.dimensions[-1] == 'TIME_PERIOD'
# data.dim_at_obs
series_keys = list(data.series)
assert len(series_keys) == 16
series_keys[5]
assert (sorted(set(sk.FREQ.value for sk in data.series))
== 'A D H M Q'.split())
daily = sdmx.to_pandas(data).xs('D', level='FREQ')
assert len(daily) == 514
assert_pd_equal(daily.tail().values,
np.array([1.0446, 1.0445, 1.0401, 1.0453, 1.0541]))
def test_write_conceptscheme():
with specimen('common-structure.xml') as f:
msg = sdmx.read_sdmx(f)
data = sdmx.to_pandas(msg)
cdc = data['concept_scheme']['CROSS_DOMAIN_CONCEPTS']
assert cdc.loc['UNIT_MEASURE', 'name'] == 'Unit of Measure'
def test_doc_howto_timeseries():
with specimen("sg-ts.xml") as f:
ds = pandasdmx.read_sdmx(f).data[0]
# Convert to pd.Series and unstack the time dimension to columns
base = pandasdmx.to_pandas(ds)
s1 = base.unstack("TIME_PERIOD")
# DatetimeIndex on columns
s1.columns = pd.to_datetime(s1.columns)
assert isinstance(s1.columns, pd.DatetimeIndex)
# DatetimeIndex on index
s2 = base.unstack("TIME_PERIOD").transpose()
s2.index = pd.to_datetime(s2.index)
assert isinstance(s2.index, pd.DatetimeIndex)
# Same with pd.PeriodIndex
s3 = s1.to_period(axis=1)
assert isinstance(s3.columns, pd.PeriodIndex)
assert s3.columns.freqstr == "M"
s4 = s2.to_period(axis=0)
assert isinstance(s4.index, pd.PeriodIndex)
assert s4.index.freqstr == "M"
def dump_dimension(dsd, dim_name: str, all: bool = False):
if all:
print(dsd.dimensions.components)
print(dsd.attributes.components)
e = dsd.dimensions.get(dim_name).local_representation.enumerated
df = sdmx.to_pandas(e)
print(df)
def test_write_conceptscheme():
with specimen("common-structure.xml") as f:
msg = pandasdmx.read_sdmx(f)
data = pandasdmx.to_pandas(msg)
cdc = data["concept_scheme"]["CROSS_DOMAIN_CONCEPTS"]
assert cdc.loc["UNIT_MEASURE", "name"] == "Unit of Measure"
def fetch_dataset(db_collection, flow_name: str, parameters):
# 1. try CSV fetch, if that doesnt work then try PandasSDMX to get the dataframe
data_response = requests.get(url,
params=parameters,
headers={"Accept": "text/csv"})
assert data_response.status_code == 200
with get_tempfile() as fp:
fp.write(data_response.text.encode())
fp.seek(0)
kwargs = ({} if not flow_name in extra_csv_parms else dict(
**extra_csv_parms[flow_name]))
try:
df = pd.read_csv(fp, **kwargs)
save_dataframe(db_collection, {}, df, url, "ECB")
return
except pd.errors.EmptyDataError: # no data is ignored as far as --fail-fast is concerned
print(
f"No CSV data to save.. now trying {flow_name} using pandasdmx"
)
# FALLTHRU...
# 2. try pandassdmx if CSV fetch fails
ecb = sdmx.Request("ECB", backend="memory")
data_msg = ecb.data(flow_name, params=parameters)
df = sdmx.to_pandas(data_msg)
assert isinstance(df, pd.DataFrame)
save_dataframe(db_collection, {}, df, url, "ECB")
def get_available_of_dimension(dsd: sdmx.model.DataStructureDefinition,
dim_name: str):
dim = dsd.dimensions.get(dim_name).local_representation.enumerated
available_results = sdmx.to_pandas(dim)
#print(type(available_results))
assert isinstance(available_results, pd.Series)
return available_results
def get_df(data_response, Logger):
try:
oecd_data = data_response
df = pandasdmx.to_pandas(oecd_data,
datetime=dict(dim='TIME_PERIOD', axis=1))
except req.exceptions.ConnectionError as err:
Logger.critical(f'response took too long, this is the error: {err}')
return df
def test_pandas(self, msg):
data = msg.data[0]
series_keys = list(data.series.keys())
# Number of series in dataframe
assert len(series_keys) == 4
# Convert the observations for one SeriesKey to a pd.Series
s3_key = series_keys[3]
s3 = sdmx.to_pandas(data.series[s3_key])
assert isinstance(s3, pd.Series)
# Test a particular value
assert s3[0] == 1.2894
# Length of index
assert len(s3.index.names) == 6
# Convert again, with attributes
pd_data = sdmx.to_pandas(data, attributes='osgd')
# Select one SeriesKey's data out of the DataFrame
keys, levels = zip(*[(kv.value, kv.id) for kv in s3_key])
s3 = pd_data.xs(keys, level=levels, drop_level=False)
# Get the value of the first observation
assert s3.iloc[0].value == 1.2894
# Length of index
assert len(s3.index.names) == 6
# Number of attributes available
assert len(set(s3.columns) - {'value'}) == 7
# Access an attribute of the first value.
# NB that this uses…
# 1. the *pandas* attribute access shorthand, NOT DictLike:
# "s3.iloc[0]" is a single row of s3, i.e. a pd.Series; and
# ".OBS_STATUS" accesses the ps.Series element associated with that
# key in the index
# 2. the AttributeValue.__eq__() comparison operator;
# s3.iloc[0].OBS_STATUS is a full AttributeValue, rather than a str.
assert s3.iloc[0].OBS_STATUS == 'A'
assert s3.iloc[0].OBS_STATUS.value_for == 'OBS_STATUS' # consistency!
def test_write_categoryscheme():
with specimen("IPI-2010-A21-structure.xml") as f:
msg = pandasdmx.read_sdmx(f)
data = pandasdmx.to_pandas(msg)
cs = data["category_scheme"]["CLASSEMENT_DATAFLOWS"]
assert cs.loc["COMPTA-NAT", "name"] == "National accounts (GDP, consumption...)"
# Children appear
assert cs.loc["CNA-PIB-2005", "parent"] == "CNA-PIB"
def test_write_data(data_path):
msg = sdmx.read_sdmx(data_path)
result = sdmx.to_pandas(msg)
expected = expected_data(data_path)
if expected is not None:
print(expected, result, sep='\n')
assert_pd_equal(expected, result)
# TODO incomplete
assert isinstance(result, (pd.Series, pd.DataFrame, list)), type(result)
def test_doc_example():
"""Code from example.rst."""
import pandasdmx
estat = pandasdmx.Request("ESTAT")
metadata = estat.datastructure("DSD_une_rt_a")
for cl in "CL_AGE", "CL_UNIT":
print(pandasdmx.to_pandas(metadata.codelist[cl]))
resp = estat.data("une_rt_a",
key={"GEO": "EL+ES+IE"},
params={"startPeriod": "2007"})
data = pandasdmx.to_pandas(resp,
datetime=dict(dim='TIME_PERIOD',
freq='FREQ')).xs("Y15-74",
axis=1,
level="AGE",
drop_level=False)
data.loc[:, ("Y15-74", "PC_ACT", "T")]
# Further checks per https://github.com/dr-leo/pandaSDMX/issues/157
# DimensionDescriptor for the structure message
dd1 = metadata.structure.DSD_une_rt_a.dimensions
# DimensionDescriptor retrieved whilst validating the data message
dd2 = resp.data[0].structured_by.dimensions
# DimensionDescriptors have same ID, components and order
assert dd1 == dd2
# One SeriesKey from the data message
sk = list(resp.data[0].series.keys())[0]
# Key values have same order as in the DSD
assert dd1.order_key(sk) == sk
def test_write_categoryscheme():
with specimen('IPI-2010-A21-structure.xml') as f:
msg = sdmx.read_sdmx(f)
print(msg.category_scheme)
data = sdmx.to_pandas(msg)
cs = data['category_scheme']['CLASSEMENT_DATAFLOWS']
assert (cs.loc['COMPTA-NAT',
'name'] == 'National accounts (GDP, consumption...)')
# Children appear
assert cs.loc['CNA-PIB-2005', 'parent'] == 'CNA-PIB'
