Account for pitches without batted balls

stats.py

@@ -274,6 +274,15 @@ def compute_pitch_stats(data, player_type, pitch_class_type, min_pitches=1, pitc
               {'batted_ball_direction': 'Pull', 'proportion': None},
               {'batted_ball_direction': 'Cent', 'proportion': None},
               {'batted_ball_direction': 'Oppo', 'proportion': None}
+          ])),
+          pl.when(pl.col('batType').list.len() > 0)
+          .then('batType')
+          .otherwise(pl.lit([
+              {'batType': 'G', 'proportion': None},
+              {'batType': 'B', 'proportion': None},
+              {'batType': 'P', 'proportion': None},
+              {'batType': 'F', 'proportion': None},
+              {'batType': 'L', 'proportion': None},
           ]))
       )
       .explode('batType')
@@ -294,7 +303,7 @@ def compute_pitch_stats(data, player_type, pitch_class_type, min_pitches=1, pitc
           # (pl.col('F') + pl.col('P') + pl.col('L')).alias('AIR%')
           
       )
-      .drop('G', 'F', 'B', 'P', 'L', 'Pull', 'Cent', 'Oppo', 'null')
+      .drop('G', 'F', 'B', 'P', 'L', 'Pull', 'Cent', 'Oppo')
       .with_columns(
           # (pl.when(pl.col('qualified')).then(pl.col(stat)).rank(descending=((stat in ['FB%', 'LD%', 'OFFB%', 'AIR%', 'Ball%', 'Behind%'] or 'Contact%' in stat)))/pl.when(pl.col('qualified')).then(pl.col(stat)).count()).alias(f'{stat}_pctl')
           # for stat in ['Avg KPH', 'Max KPH', 'Avg MPH', 'Max MPH', 'Swing%', 'Z-Swing%', 'Chase%', 'Contact%', 'Z-Contact%', 'O-Contact%', 'SwStr%', 'Whiff%', 'CSW%', 'Strike%', 'Ball%', 'F-Str%', 'PAR%', 'GB%', 'FB%', 'LD%', 'OFFB%', 'IFFB%', 'AIR%', 'Zone%', 'Behind%']