Refactor out mutable default args, close #20

Author: brews

src/dscim/diagnostics/discount_rates.py

@@ -12,13 +12,13 @@ def plot_implicit_rates(
     eta,
     rho,
     fair_aggregation="ce",
-    ssp=["SSP3"],
-    model=["IIASA GDP"],
-    rcp=["ssp585", "ssp245", "ssp460", "ssp370", "Naive Ramsey"],
-    weitzman_parameter=["0.001", "0.1", "1.0"],
+    ssp=("SSP3",),
+    model=("IIASA GDP",),
+    rcp=("ssp585", "ssp245", "ssp460", "ssp370", "Naive Ramsey"),
+    weitzman_parameter=("0.001", "0.1", "1.0"),
     pulse_year=2020,
-    recipes=["risk_aversion", "equity"],
-    discounting=["ramsey", "gwr"],
+    recipes=("risk_aversion", "equity"),
+    discounting=("ramsey", "gwr"),
     aspect=0.4,
     save_path=None,
     csv=True,