def get_value_meta(self, value, meta_conf):
# type: (pd.DataFrame, ValueMetaConf) -> ValueMeta
data_schema = {}
if meta_conf.log_schema:
data_schema.update({
"type": self.type_str,
"columns": list(value.columns),
"shape": value.shape,
"dtypes":
{col: str(type_)
for col, type_ in value.dtypes.items()},
})
if meta_conf.log_size:
data_schema["size"] = int(value.size)
if meta_conf.log_preview:
value_preview = self.to_preview(
value, preview_size=meta_conf.get_preview_size())
data_hash = fast_hasher.hash(
hash_pandas_object(value, index=True).values)
else:
value_preview = None
data_hash = None
return ValueMeta(
value_preview=value_preview,
data_dimensions=value.shape,
data_schema=data_schema,
data_hash=data_hash,
)
def test_df_value_meta(self, pandas_data_frame):
expected_data_schema = {
"type": DataFrameValueType.type_str,
"columns": list(pandas_data_frame.columns),
"size": int(pandas_data_frame.size),
"shape": pandas_data_frame.shape,
"dtypes": {
col: str(type_)
for col, type_ in pandas_data_frame.dtypes.items()
},
}
meta_conf = ValueMetaConf.enabled()
expected_value_meta = ValueMeta(
value_preview=DataFrameValueType().to_preview(
pandas_data_frame, preview_size=meta_conf.get_preview_size()),
data_dimensions=pandas_data_frame.shape,
data_schema=expected_data_schema,
data_hash=fast_hasher.hash(
hash_pandas_object(pandas_data_frame, index=True).values),
)
df_value_meta = DataFrameValueType().get_value_meta(
pandas_data_frame, meta_conf=meta_conf)
assert df_value_meta.value_preview == expected_value_meta.value_preview
assert df_value_meta.data_hash == expected_value_meta.data_hash
assert json_utils.dumps(df_value_meta.data_schema) == json_utils.dumps(
expected_value_meta.data_schema)
assert df_value_meta.data_dimensions == expected_value_meta.data_dimensions
assert df_value_meta == expected_value_meta
def test_str_value_meta(self):
str_value_meta = StrValueType().get_value_meta("foo", ValueMetaConf.enabled())
expected_value_meta = ValueMeta(
value_preview="foo",
data_dimensions=None,
data_schema={"type": "str"},
data_hash=fast_hasher.hash("foo"),
)
assert str_value_meta == expected_value_meta
def test_df_value_meta(
self, pandas_data_frame, pandas_data_frame_histograms, pandas_data_frame_stats
):
expected_data_schema = {
"type": DataFrameValueType.type_str,
"columns": list(pandas_data_frame.columns),
"size": int(pandas_data_frame.size),
"shape": pandas_data_frame.shape,
"dtypes": {
col: str(type_) for col, type_ in pandas_data_frame.dtypes.items()
},
}
meta_conf = ValueMetaConf.enabled()
expected_value_meta = ValueMeta(
value_preview=DataFrameValueType().to_preview(
pandas_data_frame, preview_size=meta_conf.get_preview_size()
),
data_dimensions=pandas_data_frame.shape,
data_schema=expected_data_schema,
data_hash=fast_hasher.hash(
hash_pandas_object(pandas_data_frame, index=True).values
),
descriptive_stats=pandas_data_frame_stats,
histograms=pandas_data_frame_histograms,
)
df_value_meta = DataFrameValueType().get_value_meta(
pandas_data_frame, meta_conf=meta_conf
)
assert df_value_meta.value_preview == expected_value_meta.value_preview
assert df_value_meta.data_hash == expected_value_meta.data_hash
assert json_utils.dumps(df_value_meta.data_schema) == json_utils.dumps(
expected_value_meta.data_schema
)
assert df_value_meta.data_dimensions == expected_value_meta.data_dimensions
std = df_value_meta.descriptive_stats["Births"].pop("std")
expected_std = expected_value_meta.descriptive_stats["Births"].pop("std")
assert round(std, 2) == expected_std
df_value_meta.descriptive_stats["Names"].pop("top")
assert df_value_meta.descriptive_stats == expected_value_meta.descriptive_stats
counts, values = df_value_meta.histograms.pop("Names")
expected_counts, expected_values = expected_value_meta.histograms.pop("Names")
assert counts == expected_counts
assert set(values) == set(expected_values) # order changes in each run
# histograms are tested in histogram tests and they change a lot, no need to test also here
df_value_meta.histograms = expected_value_meta.histograms = None
expected_value_meta.histogram_system_metrics = (
df_value_meta.histogram_system_metrics
)
assert df_value_meta.data_schema == expected_value_meta.data_schema
assert attr.asdict(df_value_meta) == attr.asdict(expected_value_meta)
def test_target_value_meta(self):
v = target("a")
meta_conf = ValueMetaConf.enabled()
target_value_meta = TargetPathLibValueType().get_value_meta(
v, meta_conf=meta_conf)
expected_value_meta = ValueMeta(
value_preview='"a"',
data_dimensions=None,
data_schema={"type": "Path"},
data_hash=fast_hasher.hash(v),
)
assert target_value_meta == expected_value_meta
def get_value_meta(self, value, meta_conf):
# type: (pd.DataFrame, ValueMetaConf) -> ValueMeta
data_schema = {}
if meta_conf.log_schema:
data_schema.update({
"type": self.type_str,
"columns": list(value.columns),
"shape": value.shape,
"dtypes":
{col: str(type_)
for col, type_ in value.dtypes.items()},
})
if meta_conf.log_size:
data_schema["size.bytes"] = int(value.size)
value_preview, data_hash = None, None
if meta_conf.log_preview:
value_preview = self.to_preview(
value, preview_size=meta_conf.get_preview_size())
try:
data_hash = fast_hasher.hash(
hash_pandas_object(value, index=True).values)
except Exception as e:
logger.warning(
"Could not hash dataframe object %s! Exception: %s", value,
e)
if meta_conf.log_histograms:
start_time = time.time()
stats, histograms = PandasHistograms(
value, meta_conf).get_histograms_and_stats()
hist_sys_metrics = {
"histograms_and_stats_calc_time": time.time() - start_time
}
else:
stats, histograms = {}, {}
hist_sys_metrics = None
return ValueMeta(
value_preview=value_preview,
data_dimensions=value.shape,
data_schema=data_schema,
data_hash=data_hash,
descriptive_stats=stats,
histogram_system_metrics=hist_sys_metrics,
histograms=histograms,
)
def test_df_value_meta(self, pandas_data_frame):
expected_data_schema = {
"type": DataFrameValueType.type_str,
"columns": list(pandas_data_frame.columns),
"size.bytes": int(pandas_data_frame.size),
"shape": pandas_data_frame.shape,
"dtypes": {
col: str(type_)
for col, type_ in pandas_data_frame.dtypes.items()
},
}
meta_conf = ValueMetaConf.enabled()
expected_value_meta = ValueMeta(
value_preview=DataFrameValueType().to_preview(
pandas_data_frame, preview_size=meta_conf.get_preview_size()),
data_dimensions=pandas_data_frame.shape,
data_schema=expected_data_schema,
data_hash=fast_hasher.hash(
hash_pandas_object(pandas_data_frame, index=True).values),
)
df_value_meta = DataFrameValueType().get_value_meta(
pandas_data_frame, meta_conf=meta_conf)
assert df_value_meta.value_preview == expected_value_meta.value_preview
assert df_value_meta.data_hash == expected_value_meta.data_hash
assert df_value_meta.data_schema == expected_value_meta.data_schema
assert df_value_meta.data_dimensions == expected_value_meta.data_dimensions
assert df_value_meta.data_schema == expected_value_meta.data_schema
# histograms and stats are tested in histogram tests and they change a lot, no need to test also here
assert set([
col_stats.column_name for col_stats in df_value_meta.columns_stats
]) == {"Names", "Births"}
assert set(df_value_meta.histograms.keys()) == {"Names", "Births"}
def _safe_hash(value):
try:
return fast_hasher.hash(value)
except:
logger.info("Failed to hash value of type %s", type(value))
return None
def to_signature(self, x):
shape = "[%s]" % (",".join(map(str, x.shape)))
return "%s:%s" % (shape, fast_hasher.hash(x))
def to_signature(self, x):
return fast_hasher.hash(x)
def get_data_hash(self, value):
return fast_hasher.hash(value)
def get_data_hash(self, value):
return fast_hasher.hash(hash_pandas_object(value, index=True).values)
