Add literals instead of constructors

Author: christopher-wild

causal_testing/data_collection/data_collector.py

@@ -45,7 +45,7 @@ def filter_valid_data(self, data: pd.DataFrame, check_pos: bool = True) -> pd.Da
         solver = z3.Solver()
         for c in self.scenario.constraints:
             solver.assert_and_track(c, f"background: {c}")
-        sat = list()
+        sat = []
         unsat_core = None
         for _, row in data.iterrows():
             solver.push()

causal_testing/specification/causal_specification.py

@@ -10,6 +10,9 @@
 
 
 class CausalSpecification(ABC):
+    """
+    Abstract Class for the Causal Specification (combination of Scenario and Causal Dag)
+    """
     def __init__(self, scenario: Scenario, causal_dag: CausalDAG):
         self.scenario = scenario
         self.causal_dag = causal_dag

causal_testing/testing/causal_test_outcome.py

@@ -36,7 +36,7 @@ def __init__(
         if effect_modifier_configuration is not None:
             self.effect_modifier_configuration = effect_modifier_configuration
         else:
-            self.effect_modifier_configuration = dict()
+            self.effect_modifier_configuration = {}
 
     def __str__(self):
         base_str = (

causal_testing/testing/estimators.py

@@ -48,7 +48,7 @@ def __init__(
         self.outcome = outcome
         self.df = df
         if effect_modifiers is None:
-            self.effect_modifiers = dict()
+            self.effect_modifiers = {}
         elif isinstance(effect_modifiers, set) or isinstance(effect_modifiers, list):
             self.effect_modifiers = {k.name for k in effect_modifiers}
         elif isinstance(effect_modifiers, dict):