Remove winning party

pipeline/download/election_results.py

@@ -8,7 +8,7 @@ import polars as pl
 # One row per candidate per constituency — we aggregate to per-constituency stats.
 URL = "https://electionresults.parliament.uk/general-elections/6/candidacies.csv"
 
-# Map party names to a smaller set for the enum feature and vote share columns.
+# Map party names to a smaller set for vote share columns.
 # Only parties that won seats in England are kept; the rest become "Other parties".
 PARTY_MAP = {
     "Labour": "Labour",
@@ -37,10 +37,9 @@ def download_and_convert(output_path: Path) -> None:
         .alias("party_group"),
     )
 
-    # ── Per-constituency winner stats ──
-    winners = df.filter(pl.col("Candidate result position") == 1).select(
+    # ── Per-constituency turnout ──
+    turnout = df.filter(pl.col("Candidate result position") == 1).select(
         pl.col("Constituency geographic code").alias("pcon"),
-        pl.col("party_group").alias("winning_party"),
         (pl.col("Election valid vote count") / pl.col("Electorate") * 100)
         .round(1)
         .alias("turnout_pct"),
@@ -72,14 +71,11 @@ def download_and_convert(output_path: Path) -> None:
     rename_map = {col: f"% {col}" for col in party_pct.columns if col != "pcon"}
     party_pct = party_pct.rename(rename_map)
 
-    # Join winner stats with party vote shares
-    result = winners.join(party_pct, on="pcon", how="left")
+    # Join turnout with party vote shares
+    result = turnout.join(party_pct, on="pcon", how="left")
 
     print(f"Constituencies: {result.height}")
     print(f"Columns: {result.columns}")
-    print(
-        f"Party breakdown:\n{result['winning_party'].value_counts().sort('count', descending=True)}"
-    )
 
     output_path.parent.mkdir(parents=True, exist_ok=True)
     result.write_parquet(output_path, compression="zstd")

pipeline/transform/merge.py

@@ -63,7 +63,6 @@ _AREA_COLUMNS = [
     # Demographics
     "Median age",
     # Politics
-    "Winning party",
     "Voter turnout (%)",
     "% Labour",
     "% Conservative",
@@ -361,7 +360,6 @@ def _build(
                 "floor_height": "Interior height (m)",
                 "was_council_house": "Former council house",
                 "median_age": "Median age",
-                "winning_party": "Winning party",
                 "turnout_pct": "Voter turnout (%)",
             }
         )