def get_observation(composite: Dict,
period: str,
variable: Variable,
treat_missing_as_null=False) -> Optional[Any]:
"""Get the value of a temporal variable for a particular observation period."""
path: List = [period] + list(variable.absolute_path)
return nesteddicts.get(composite, path, accept_none=treat_missing_as_null)
def __call__(self, composite: Dict):
person_name_path = ["invariant"] + list(self.person_name_var.absolute_path)
person_name: str = nesteddicts.get(composite, person_name_path)
lc_name = person_name.lower()
gender = self.lookups["genders"][lc_name]
gender_path = ["invariant"] + list(self.gender_var.absolute_path)
nesteddicts.put(composite, gender_path, gender)
def __call__(self, composite: Dict):
periods = set(composite.keys()) - {"invariant"}
earliest = min(periods)
latest = max(periods)
weight_path = list(self.weight_var.absolute_path)
earliest_weight_path: list = [earliest] + weight_path
earliest_weight: float = nesteddicts.get(composite, earliest_weight_path)
latest_weight_path: list = [latest] + weight_path
latest_weight: float = nesteddicts.get(composite, latest_weight_path)
# I know, should have called it "weight change."
weight_gain = round(latest_weight - earliest_weight, 2)
weight_gain_path = ["invariant"] + list(self.weight_gain_var.absolute_path)
nesteddicts.put(composite, weight_gain_path, weight_gain)
def __call__(self, composite: Dict):
# IRL, you'd have to handle nulls, decide how to deal with temporal variables, etc.
color_name_path = ["invariant"] + list(self.color_name_var.absolute_path)
color_name = nesteddicts.get(composite, color_name_path)
# At some point, I'll write a fancy retrieval/validation/assignment system, but that's not for the MVP
rgb_value = self.lookups["color_names"][color_name]
rgb_path = ["invariant"] + list(self.rgb_var.absolute_path)
nesteddicts.put(composite, rgb_path, rgb_value)
def _do_get_test(data: Dict,
spec: List[str],
default: Any = None,
expected: Optional[str] = "expected",
accept_none: bool = False) -> None:
actual: Any = nesteddicts.get(data,
spec,
default=default,
accept_none=accept_none)
assert actual == expected
def get_value(composite: Dict, invariant_variable: Variable) -> Optional[Any]:
path = ["invariant"] + list(invariant_variable.absolute_path)
value = nesteddicts.get(composite, path)
return value
def test_get_not_nested(default: Optional[str]):
spec: List[str] = ["a", "b", "c"]
data: Dict = {"a": {"b": "I'm supposed to be nested, but I'm not"}}
with raises(nesteddicts.IncompleteNestingError):
nesteddicts.get(data, spec, default=default)
def test_empty_spec_returns_self():
data: Dict = {"a": {"b": {"c": "expected"}}}
spec: List[str] = []
expected: Dict = data
actual: Any = nesteddicts.get(data, spec)
assert actual == expected
def get_all_observations(composite: Dict,
variable: Variable) -> Iterator[Tuple[str, Any]]:
"""Iterate over all observations of a temporal variable from this composite."""
var_path: List = list(variable.absolute_path)
for period in get_periods(composite):
yield period, nesteddicts.get(composite, [period] + var_path)
def get_property(composite: Dict, prop: Variable) -> Optional[Any]:
"""Get an invariant "variable" (property) from this composite."""
path = ["invariant"] + list(prop.absolute_path)
return nesteddicts.get(composite, path)