Small clean up

pipeline/transform/merge.py

@@ -265,6 +265,8 @@ def _build(
         .when(has_epc)
         .then(pl.col("epc_property_type"))
         .otherwise(pl.col("pp_property_type"))
+        # Unify EPC's "Flat"/"Maisonette" with price-paid's "Flats/Maisonettes"
+        .replace({"Flat": "Flats/Maisonettes", "Maisonette": "Flats/Maisonettes"})
         .alias("property_type")
     )
 

pipeline/transform/price_estimation/utils.py

@@ -18,7 +18,7 @@ TERRACE_TYPES = [
     "Enclosed End-Terrace",
     "Terraced",
 ]
-FLAT_TYPES = ["Flats/Maisonettes", "Flat", "Maisonette"]
+FLAT_TYPES = ["Flats/Maisonettes"]
 TYPE_GROUPS = ["Detached", "Semi-Detached", "Terraced", "Flats", "Bungalow"]
 SHRINKAGE_K = 50