Winner Carreras Americanas [Best ◉]

# Fill NaNs race_history_df = race_history_df.fillna(0)

# Average speed figure last 3 races race_history_df['avg_speed_last3'] = ( race_history_df.groupby('horse_id')['speed_figure'] .transform(lambda x: x.rolling(3, min_periods=1).mean()) ) winner carreras americanas

# Days since last race race_history_df['days_since_last'] = ( race_history_df.groupby('horse_id')['race_date'].diff().dt.days ) # Fill NaNs race_history_df = race_history_df